I'm not sure, because Plex told me to come here and report this error

[FordGuy61]

Update from Plex with workaround:

PMS v1.42.1 Core Component Error Workaround and Information

Hi everyone!! Wanted to create a centralized place for communications around the status of this issue as it is popping up in a bunch of places. First - we have a solid understanding of what is causing this issue and will be working to validate a new build that addresses this over the next few days. First - this is a bug that was introduced in the beta version 1.42.0 (we have successfully replicated this in this version) and is only related to the embedded web client and most are now seeing it …