I have a problem with 4.23.2 Pro
Fatal error: Call to undefined method PucFactory::addVersion() in /wp-content/plugins/user-role-editor-pro/includes/pro/plugin-update-checker.php on line 1053
I can not install the plugin which has bug Website previously.
This part was not changed from a very begin. Method PucFactory::addVersion() is defined at the same file, line #1041. I suppose you may have installed another version of class PucFactory, as it’s defined here just in condition that it does not exist yet, line #963:
if ( !class_exists('PucFactory') ):
Could you please check, what other plugin causes this conflict?