Web Compatibility Support • Encora.it errors

Encora.it is a website indexing recorded theater productions. It requires login, but registration is easy and free. The code for the site is being modified frequently and seemed to work in Pale Moon (at least for what I was doing) until about 2 weeks ago. Now I am able to log in and to search for a production, but when I click on the name of the production, I get a blank screen (instead of a page of information as seen in Edge). I reported this to the site on their Discord, but the site maintainer didn't see a problem with their code and seemed satisfied that it worked in the main browsers that people use. I suspect that they would change their code if simple changes would do the trick and be shown to them. Here are some errors that I see with Developer Tools Console:
Comment from the Encora maintainer in their Discord:'
This looks to be an issue with PaleMoon not handling links - If you go to direct URLs the pages do load correctly (also works if you open the link in a new tab). eg Clicking Shows in the sidebar doesn't add /shows to the URL. In a new tab however, it does, which loads the content correctly. This would be a bug that would need reporting to PaleMoon rather than me.

Does anyone have any suggestions for a fix, either on the Encora site or in Palemoon? Thanks.

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