Have locally updated uSync to 11.2.1 in an 11.2.2 site. Have pushed it live but when opening the uSync dashboard, I get a 404 error in the console for the above file and no dashboard. Checking locally, I don't see a uSync folderin App_Plugins but if I put the path in a browser on the local dev machine, it hits the file and displays it, so where on earth is it? I've re-uploaded all dlls but the issue remains. Is it hidden in some RCL or something? Please advise.

Yes, it is likely hidden in an RCL. If you're looking for it on your live site, you'll probably find it in

wwwroot/App_Plugins/uSync/

Phew! Thanks for that. Totally forgot there was "another [secret]" App_Plugins" folder 🙂

glad I could help 😊

dotnet publish

for the win 😉 - don't push the files from your folder but do a dotnet publish and the resultant files (in the output folder) are your website.

I use Rider and publish to a folder. It's what's in that folder I then FTP up to the server. I only transfer the stuff that needs transferring. It's quicker and recoverable when things go wrong. I'd just forgotten about that App-Plugins folder that's all.