Thank you, @Dave_O, for taking the time to help debug this issue together.
For others experiencing the same problem, @here, here’s how we resolved it in Dave’s case:
- Go to File > Options and settings > Options.
- Navigate to the Security tab.
- Under Authentication Browser, uncheck the box for “Use my default web browser.”
This solution seems to resolve the error message: “Value cannot be null. Parameter name: uriString.”