To preface, it is strongly recommended to use only one full page cache plugin for full page caching. This guide is intended for admins who like some features from other cache plugins that aren't available in LSCWP.

First, set up the WordPress install with the other cache plugin to satisfaction. Doing this part first will make things easier because the full page cache will not be enabled yet.

Once set up, disable the full page cache.

Install and activate LSCWP. Upon activation, the following warning message will display if the above cache plugin uses the advanced-cache.php file.

If the message does not display, even after a few refreshes, let us know. We need to know which plugin was previously used and which features are still used. It is possible that the cache plugin does not use the advanced-cache.php file, but it is just as likely that there is a hidden underlying issue.

The message indicates that there is another cache plugin currently active, which is expected.

The last step is to configure LSCWP to leave the other plugin's advanced-cache.php file. Under Settings → LiteSpeed Cache → Advanced, uncheck the Check Advanced Cache option.

After saving, the warning should no longer display. If the message is still there, let us know.