I tested the update with UiPress Lite version 3.3.100. Is “admin2020” some separate thing, and, if so, where can I find it? I’ve tried searching for it and it looks like it might have been an old version/predecessor of UiPress, but it wasn’t clear. In any case, what version of it are you running?
Also, are there any errors in the browser’s JS console?
Thank you for the screenshot. Unfortunately, the warnings shown don’t seem related to the admin menu or to this plugin. (There are two screenshot links but the images appear identical.)
I guess all I can recommend is to update to the latest version of UiPress. I don’t think it’s practical for me to try to ensure compatibility with an old version of another plugin that’s apparently more than 3 years old and most likely not supported even by its original author.
What is weird is that I updated the plugin on a different multisite network where I use the Admin2020 theme and didn’t face any issue at all in the left admin menu for subsites.
Unfortunately, I don’t know enough Admin2020 to guess why that might be. There are many possibilities, like a different combination of active plugins, different plugin settings, server configuration, etc.
Is there anyway I can give you a login to my test environment so as to investigate further?
You can use this contact form; it goes to my email. If you send a login for a site that is currently experiencing the issue, I’ll take a look when I have time.
