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I get a fatal PHP error after upgrading Real Media Library to v4.6

The version 4.6 has some changes compared to earlier versions which lead to a visible error. The error only appears immediately after the update of the plugin and will be fixed automatically when you reload the website once in your browser.

This error can be ignored and will not occur in future updates. Here is an example how the error will look like:

plugin lists error example

If your WordPress is configured to automatically send an email to the site administrator after a PHP error, you can ignore it as mentioned above. The error messages may look like the following:

An error of type E_ERROR was caused in line 194 of the file /home/user/wp-content/plugins/real-media-library/inc/general/Core.class.php. Error message: Uncaught Error: Class 'MatthiasWeb\RealMediaLibrary\attachment\CountCache' not found in /home/user/wp-content/plugins/real-media-library/inc/general/Core.class.php:194
Stack trace:
#0 /home/user/wp-includes/class-wp-hook.php(288): MatthiasWeb\RealMediaLibrary\general\Core->update_count('_ajax_wp_die_ha...')
#1 /home/user/wp-includes/plugin.php(206): WP_Hook->apply_filters('_ajax_wp_die_ha...', Array)
#2 /home/user/wp-includes/functions.php(3239): apply_filters('wp_die_ajax_han...', '_ajax_wp_die_ha...')
#3 /home/user/wp-includes/functions.php(3975): wp_die('', '', Array)
#4 /home/user/wp-includes/functions.php(3999): wp_send_json(Array, NULL)
#5 /home/user/wp-admin/includes/ajax-actions.php(4457): wp_send_json_success(Array)
An error of type E_ERROR was caused in line 172 of the file /home/user/wp-content/plugins/real-media-library/vendor/matthiasweb/wordpress-plugin-updater/plugin-update-checker-4.4/Puc/v4p4/StateStore.php. Error message: Uncaught Error: Class 'Puc_v4p4_Utils' not found in /home/user/wp-content/plugins/real-media-library/vendor/matthiasweb/wordpress-plugin-updater/plugin-update-checker-4.4/Puc/v4p4/StateStore.php:172
Stack trace:
#0 /home/user/wp-content/plugins/real-media-library/vendor/matthiasweb/wordpress-plugin-updater/plugin-update-checker-4.4/Puc/v4p4/StateStore.php(155): Puc_v4p4_StateStore->load()
#1 /home/user/wp-content/plugins/real-media-library/vendor/matthiasweb/wordpress-plugin-updater/plugin-update-checker-4.4/Puc/v4p4/UpdateChecker.php(246): Puc_v4p4_StateStore->lazyLoad()
#2 /home/user/wp-content/plugins/real-media-library/vendor/matthiasweb/wordpress-plugin-updater/plugin-update-checker-4.4/Puc/v4p4/Scheduler.php(97): Puc_v4p4_UpdateChecker->getUpdateState()