Nest Integration Error - Blank Dialogue Box

I’ve been trying to integrate my Google Nest, and got through the process successfully; however, each time I reach the final step I’ met with an empty dialogue box and no devices are shown within integrations. Anyone experienced this and know how to troubleshoot?

Same here. Did you get to solve this problem?
Edit:
IPv6 issue, solved it!

Any more insight on this error as I am receiving it too - the thing is my router and server (running HA in docker) already have IPV6 disabled?? Would a reverse proxy on the server to access HA cause issues?

Update: Sorted this by increasing the timeout on my reverse proxy - needed more than 2 minutes for Google to repond.