As I was opening a workflow with several tasks, I noticed that several settings/fields for the tasks did not display, not even the labels. In the browser console I have over 40 500 errors with the following information:
Is this something that has recently started to happen?
Or has there been a change made to the Workflows, that resulted in this?
(Or any changes to the Environment/Hosting ?)
I think the first thing that would be worth checking is that your Environment meets the Compatibility Matrix:
You mention that you’re using PHP 7.4, which I believe is only supported in quite Recent versions.
(7.1.19 onward / 7.10.30 onward)
Aside from that, I would recommend checking that the permissions are set correctly