Various premium WordPress plugins utilize an open source library called the “Plugin Update Checker” and LifterLMS is currently in the process of attempting to phase out and resolve compatibility issues with various plugins that utilize this plugin.
The library can be found on github.
Error message associated with this conflict will refer to the PluginUpdateChecker class.
We previously utilized this plugin but have since removed it. Since our extensions were (but no longer are) dependent on the plugin, we included a stub of the plugin’s main class so that we could gracefully phase out it’s requirement.
We’re currently stuck in a place where we cannot completely remove our stub without breaking our extensions and our stub causes other plugins that utilize the full library to break.
If you find an incompatibility, please add the following code to your wp-config.php file immediately before the
/* That's all, stop editing! Happy blogging. */ comment.