Board Thread:Support Requests - Getting Technical/@comment-44141160-20201023155319/@comment-34888194-20201023161444

As Parkour2906 said, scripts that aren't really compatible in UCP will break the other scripts, even if those are compatible with UCP. Consider remove scripts that are not compatible (or fully compatible) in UCP (such as RailWAM and UserTags). Additionally, you have a configuration in the Import page, which belongs to either MediaWiki:Wikia.js or MediaWiki:Common.js (for best practice, use the former).