Support » Plugin: WP-Optimize - Clean, Compress, Cache. » Unable to Activate WP Optimize: Minify Incompatible Plugins

  • Resolved davidaltemir


    I’ve been using WP Optimize successfully until a few weeks ago when I got a notification that the plugin was failing. I deactivated it and then tried to reactivate it. However, I can’t reactivate it because I get the following warning and error:

    Warning: require_once(/var/www/wp-content/plugins/wp-optimize/cache/class-wpo-detect-cache-plugins.php): failed to open stream: No such file or directory in /var/www/wp-content/plugins/wp-optimize/minify/class-wp-optimize-minify-incompatible-plugins.php on line 4

    Fatal error: require_once(): Failed opening required ‘/var/www/wp-content/plugins/wp-optimize/cache/class-wpo-detect-cache-plugins.php’ (include_path=’.:/opt/remi/php73/root/usr/share/pear:/opt/remi/php73/root/usr/share/php:/usr/share/pear:/usr/share/php’) in /var/www/wp-content/plugins/wp-optimize/minify/class-wp-optimize-minify-incompatible-plugins.php on line 4

    What’s this about and how do I fix it?

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  • Plugin Support Harshad


    @davidaltemir It looks like some core WP-Optimize files are missing.

    Can you please try to upload the plugin files via FTP/SFTP and check if it helps to fix the issue?

    To do this:
    1. Unzip the WP-Optmize ZIP on your local machine, using a zip utility such as 7-zip.
    2. Access your WordPress installation via FTP or your host’s filemanager.
    3. Navigate to wp-content/plugins. Upload the WP-Optimize folder here.
    4. Go to the Plugins page on your WordPress dashboard. You should see WP-Optimize in the list of plugins.

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