I have multiple machines where the MS Edge extension is installed and enabled and just stops communicating with Studio or a robot running an automation. I had this happen last week on my laptop running studio 2020.4.3. After attempting to repair Edge, remove and reinstall the and reenable the extension, it sometimes worked for a short time then stopped again. The solution last week was to uninstall Studio, reboot, reinstall studio, reinstall the extension and enable it. That worked for a few days. Today it is failing to work on robots started from on-prem orchestrator also.