diff --git a/README.md b/README.md
index 34efc8de..46bb5a69 100644
--- a/README.md
+++ b/README.md
@@ -251,7 +251,7 @@ Browse http://localhost:3000/
 [![Deploy to Cloudron](https://cloudron.io/img/button.svg)](https://www.cloudron.io/store/com.rssbridgeapp.cloudronapp.html)
 [![Run on PikaPods](https://www.pikapods.com/static/run-button.svg)](https://www.pikapods.com/pods?run=rssbridge)
 
-The Heroku quick deploy currently does not work. It might possibly work if you fork this repo and
+The Heroku quick deploy currently does not work. It might work if you fork this repo and
 modify the `repository` in `scalingo.json`. See https://github.com/RSS-Bridge/rss-bridge/issues/2688
 
 Learn more in
@@ -259,11 +259,29 @@ Learn more in
 
 ## How-to
 
+### How to remove all cache items
+
+As current user:
+
+    bin/cache-clear
+
+As user rss-bridge:
+
+    sudo -u rss-bridge bin/cache-clear
+
+As root:
+
+    sudo bin/cache-clear
+
+### How to remove all expired cache items
+
+    bin/cache-clear
+
 ### How to fix "PHP Fatal error:  Uncaught Exception: The FileCache path is not writable"
 
 ```shell
-# Give rssbridge ownership
-chown rssbridge:rssbridge -R /var/www/rss-bridge/cache
+# Give rss-bridge ownership
+chown rss-bridge:rss-bridge -R /var/www/rss-bridge/cache
 
 # Or, give www-data ownership
 chown www-data:www-data -R /var/www/rss-bridge/cache
@@ -275,6 +293,16 @@ chmod 777 -R /var/www/rss-bridge/cache
 rm -rf /var/www/rss-bridge/cache/ && mkdir /var/www/rss-bridge/cache/
 ```
 
+### How to fix "attempt to write a readonly database"
+
+The sqlite files (db, wal and shm) are not writeable.
+
+    chown -v rss-bridge:rss-bridge cache/*
+
+### How to fix "Unable to prepare statement: 1, no such table: storage"
+
+    rm cache/*
+
 ### How to create a new bridge from scratch
 
 Create the new bridge in e.g. `bridges/BearBlogBridge.php`:
@@ -389,6 +417,8 @@ These commands require that you have installed the dev dependencies in `composer
     ./vendor/bin/phpunit
     ./vendor/bin/phpcs --standard=phpcs.xml --warning-severity=0 --extensions=php -p ./
 
+https://github.com/squizlabs/PHP_CodeSniffer/wiki
+
 ### How to spawn a minimal development environment
 
     php -S 127.0.0.1:9001
diff --git a/bridges/PixivBridge.php b/bridges/PixivBridge.php
index c4f5277f..fc4443ed 100644
--- a/bridges/PixivBridge.php
+++ b/bridges/PixivBridge.php
@@ -1,9 +1,11 @@
 <?php
 
+/**
+ * Good resource on API return values (Ex: illustType):
+ * https://hackage.haskell.org/package/pixiv-0.1.0/docs/Web-Pixiv-Types.html
+ */
 class PixivBridge extends BridgeAbstract
 {
-    // Good resource on API return values (Ex: illustType):
-    // https://hackage.haskell.org/package/pixiv-0.1.0/docs/Web-Pixiv-Types.html
     const NAME = 'Pixiv Bridge';
     const URI = 'https://www.pixiv.net/';
     const DESCRIPTION = 'Returns the tag search from pixiv.net';
@@ -19,7 +21,6 @@ class PixivBridge extends BridgeAbstract
         ]
     ];
 
-
     const PARAMETERS = [
         'global' => [
             'posts' => [
@@ -251,14 +252,13 @@ class PixivBridge extends BridgeAbstract
                     $img_url = preg_replace('/https:\/\/i\.pximg\.net/', $proxy_url, $result['url']);
                 }
             } else {
-                //else cache and use image.
-                $img_url = $this->cacheImage(
-                    $result['url'],
-                    $result['id'],
-                    array_key_exists('illustType', $result)
-                );
+                $img_url = $result['url'];
+                // Temporarily disabling caching of the image
+                //$img_url = $this->cacheImage($result['url'], $result['id'], array_key_exists('illustType', $result));
             }
-            $item['content'] = "<img src='" . $img_url . "' />";
+
+            // Currently, this might result in broken image due to their strict referrer check
+            $item['content'] = sprintf('<a href="%s"><img src="%s"/></a>', $img_url, $img_url);
 
             // Additional content items
             if (array_key_exists('pageCount', $result)) {
@@ -318,7 +318,7 @@ class PixivBridge extends BridgeAbstract
             if (
                 !(strlen($proxy) > 0 && preg_match('/https?:\/\/.*/', $proxy))
             ) {
-                return returnServerError('Invalid proxy_url value set. The proxy must include the HTTP/S at the beginning of the url.');
+                returnServerError('Invalid proxy_url value set. The proxy must include the HTTP/S at the beginning of the url.');
             }
         }
 
@@ -326,8 +326,7 @@ class PixivBridge extends BridgeAbstract
         if ($cookie) {
             $isAuth = $this->loadCacheValue('is_authenticated');
             if (!$isAuth) {
-                $res = $this->getData('https://www.pixiv.net/ajax/webpush', true, true)
-                    or returnServerError('Invalid PHPSESSID cookie provided. Please check the 🍪 and try again.');
+                $res = $this->getData('https://www.pixiv.net/ajax/webpush', true, true);
                 if ($res['error'] === false) {
                     $this->saveCacheValue('is_authenticated', true);
                 }
@@ -374,11 +373,11 @@ class PixivBridge extends BridgeAbstract
         if ($cache) {
             $data = $this->loadCacheValue($url);
             if (!$data) {
-                $data = getContents($url, $httpHeaders, $curlOptions, true) or returnServerError("Could not load $url");
+                $data = getContents($url, $httpHeaders, $curlOptions, true);
                 $this->saveCacheValue($url, $data);
             }
         } else {
-            $data = getContents($url, $httpHeaders, $curlOptions, true) or returnServerError("Could not load $url");
+            $data = getContents($url, $httpHeaders, $curlOptions, true);
         }
 
         $this->checkCookie($data['headers']);
diff --git a/docs/10_Bridge_Specific/PixivBridge.md b/docs/10_Bridge_Specific/PixivBridge.md
index b782a445..ba8da2d8 100644
--- a/docs/10_Bridge_Specific/PixivBridge.md
+++ b/docs/10_Bridge_Specific/PixivBridge.md
@@ -2,9 +2,14 @@ PixivBridge
 ===============
 
 # Image proxy
-As Pixiv requires images to be loaded with the `Referer "https://www.pixiv.net/"` header set, caching or image proxy is required to use this bridge.
 
-To turn off image caching, set the `proxy_url` value in this bridge's configuration section of `config.ini.php` to the url of the proxy. The bridge will then use the proxy in this format (essentially replacing `https://i.pximg.net` with the proxy): 
+As Pixiv requires images to be loaded with the `Referer "https://www.pixiv.net/"` header set,
+caching or image proxy is required to use this bridge.
+
+To turn off image caching, set the `proxy_url` value in this bridge's configuration section of `config.ini.php`
+to the url of the proxy.
+
+The bridge will then use the proxy in this format (essentially replacing `https://i.pximg.net` with the proxy):
 
 Before: `https://i.pximg.net/img-original/img/0000/00/00/00/00/00/12345678_p0.png`
 
@@ -15,9 +20,11 @@ proxy_url = "https://proxy.example.com"
 ```
 
 # Authentication
-Authentication is required to view and search R-18+ and non-public images. To enable this, set the following in this bridge's configuration in `config.ini.php`.
 
-```
+Authentication is required to view and search R-18+ and non-public images.
+To enable this, set the following in this bridge's configuration in `config.ini.php`.
+
+```ini
 ; from cookie "PHPSESSID". Recommend to get in incognito browser. 
 cookie = "00000000_hashedsessionidhere"
 ```
\ No newline at end of file
diff --git a/index.php b/index.php
index c2c546a1..126200da 100644
--- a/index.php
+++ b/index.php
@@ -1,33 +1,14 @@
 <?php
 
-if (version_compare(\PHP_VERSION, '7.4.0') === -1) {
-    exit('RSS-Bridge requires minimum PHP version 7.4.0!');
-}
-
 require_once __DIR__ . '/lib/bootstrap.php';
 
-$errors = Configuration::checkInstallation();
-if ($errors) {
-    print '<pre>' . implode("\n", $errors) . '</pre>';
-    exit(1);
-}
-
-$customConfig = [];
-if (file_exists(__DIR__ . '/config.ini.php')) {
-    $customConfig = parse_ini_file(__DIR__ . '/config.ini.php', true, INI_SCANNER_TYPED);
-}
-Configuration::loadConfiguration($customConfig, getenv());
-
 // Consider: ini_set('error_reporting', E_ALL & ~E_DEPRECATED);
 date_default_timezone_set(Configuration::getConfig('system', 'timezone'));
 
-$rssBridge = new RssBridge();
-
 set_exception_handler(function (\Throwable $e) {
-    http_response_code(500);
-    print render(__DIR__ . '/templates/exception.html.php', ['e' => $e]);
     RssBridge::getLogger()->error('Uncaught Exception', ['e' => $e]);
-    exit(1);
+    http_response_code(500);
+    exit(render(__DIR__ . '/templates/exception.html.php', ['e' => $e]));
 });
 
 set_error_handler(function ($code, $message, $file, $line) {
@@ -63,4 +44,6 @@ register_shutdown_function(function () {
     }
 });
 
+$rssBridge = new RssBridge();
+
 $rssBridge->main($argv ?? []);
diff --git a/lib/CacheFactory.php b/lib/CacheFactory.php
index df78d9cb..90aa21ba 100644
--- a/lib/CacheFactory.php
+++ b/lib/CacheFactory.php
@@ -37,6 +37,7 @@ class CacheFactory
         if ($index === false) {
             throw new \InvalidArgumentException(sprintf('Invalid cache name: "%s"', $name));
         }
+
         $className = $cacheNames[$index] . 'Cache';
         if (!preg_match('/^[A-Z][a-zA-Z0-9-]*$/', $className)) {
             throw new \InvalidArgumentException(sprintf('Invalid cache classname: "%s"', $className));
diff --git a/lib/Configuration.php b/lib/Configuration.php
index ac7d29bf..ab1c9cdf 100644
--- a/lib/Configuration.php
+++ b/lib/Configuration.php
@@ -59,7 +59,7 @@ final class Configuration
         }
         $config = parse_ini_file(__DIR__ . '/../config.default.ini.php', true, INI_SCANNER_TYPED);
         if (!$config) {
-            throw new \Exception('Error parsing config');
+            throw new \Exception('Error parsing ini config');
         }
         foreach ($config as $header => $section) {
             foreach ($section as $key => $value) {
diff --git a/lib/bootstrap.php b/lib/bootstrap.php
index 85d823e9..fe2069d3 100644
--- a/lib/bootstrap.php
+++ b/lib/bootstrap.php
@@ -1,5 +1,9 @@
 <?php
 
+if (version_compare(\PHP_VERSION, '7.4.0') === -1) {
+    exit('RSS-Bridge requires minimum PHP version 7.4.0!');
+}
+
 // Path to the formats library
 const PATH_LIB_FORMATS = __DIR__ . '/../formats/';
 
@@ -46,3 +50,14 @@ spl_autoload_register(function ($className) {
         }
     }
 });
+
+$errors = Configuration::checkInstallation();
+if ($errors) {
+    exit('<pre>' . implode("\n", $errors) . '</pre>');
+}
+
+$customConfig = [];
+if (file_exists(__DIR__ . '/../config.ini.php')) {
+    $customConfig = parse_ini_file(__DIR__ . '/../config.ini.php', true, INI_SCANNER_TYPED);
+}
+Configuration::loadConfiguration($customConfig, getenv());
diff --git a/lib/logger.php b/lib/logger.php
index 7a902b5b..e579915d 100644
--- a/lib/logger.php
+++ b/lib/logger.php
@@ -149,6 +149,7 @@ final class StreamHandler
         );
         error_log($text);
         if ($record['level'] < Logger::ERROR && Debug::isEnabled()) {
+            // The record level is INFO or WARNING here
             // Not a good idea to print here because http headers might not have been sent
             print sprintf("<pre>%s</pre>\n", e($text));
         }
diff --git a/phpcs.xml b/phpcs.xml
index 5e50470a..21e1f50a 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -1,6 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ruleset name="RSS-Bridge Ruleset">
-  <description>Created with the PHP Coding Standard Generator. http://edorian.github.com/php-coding-standard-generator/</description>
+  <description>
+    Originally created with the PHP Coding Standard Generator.
+    But later manually tweaked.
+    http://edorian.github.com/php-coding-standard-generator/
+  </description>
+
   <exclude-pattern>./static</exclude-pattern>
   <exclude-pattern>./vendor</exclude-pattern>
   <exclude-pattern>./templates</exclude-pattern>
@@ -11,6 +16,7 @@
     <exclude name="PSR1.Classes.ClassDeclaration.MissingNamespace"/>
     <exclude name="PSR1.Classes.ClassDeclaration.MultipleClasses"/>
     <exclude name="PSR1.Files.SideEffects.FoundWithSymbols"/>
+    <exclude name="PSR2.Files.EndFileNewline"/>
     <exclude name="PSR12.Properties.ConstantVisibility.NotFound"/>
   </rule>
 
diff --git a/templates/exception.html.php b/templates/exception.html.php
index e1dd97c1..62ac90b4 100644
--- a/templates/exception.html.php
+++ b/templates/exception.html.php
@@ -23,6 +23,14 @@
             </p>
         <?php endif; ?>
 
+        <?php if ($e->getCode() === 403): ?>
+            <h2>403 Forbidden</h2>
+            <p>
+                The HTTP 403 Forbidden response status code indicates that the
+                server understands the request but refuses to authorize it.
+            </p>
+        <?php endif; ?>
+
         <?php if ($e->getCode() === 404): ?>
             <h2>404 Page Not Found</h2>
             <p>