And Roon Settings → Roon ARC at home says “Ready” or is there an error message?
If it says “Ready” and the “Poor Connection” appears on the wifi as well, including the home wifi, it can usually be fixed by resetting the ARC app from Home > Settings. Sometimes, an uninstall/reinstall of the ARC app is necessary.
However, you will lose any downloads in ARC in either case.
This seems to happen sometimes after updating:
However, if it works on the wifi at home without “poor connection”, it is also possible that the enterprise wifi is blocking some traffic.