The past few days, I've gotten the error "Something went wrong, please try again" when turning on forwarding to my OBI device. I'm using Google Chrome on a Windows 10 Pro PC, and using the link voice.google.com. I usually turn forwarding off at night, and then turn forwarding back on in the morning. Turning forwarding off always works, but the last few mornings I get the error turning forwarding on. Other linked numbers have no problems turning forwarding on-and-off. Just the OBi device has the problem.
Nothing else is wrong with the OBi device, this is just a web-based issue. I found a work-around: Use Google Voice app on my android phone, and turn on forwarding using the app after getting into settings.
This morning I was able to turn on forwarding to my OBi device without getting the error "Something went wrong, please try again" message, using Google Chrome at voice.google.com. I didn't do anything, so Google must have fixed it.
Using Google Voice on my android phone during this time always worked and was my work-around to the problem.
Have had the same experience except while using the Safari browser, kind of made it difficult while diagnosing a GVoice to CallCentric configuration.