Error adding Google account "There was a problem communicating with Google servers"

I'm using a Huawei Pura 80 Pro with the latest version of MicroG. I just tried adding a Google account through MicroG using an email address from my own custom domain. During the final agreement step (the last step before the account is actually added), I consistently receive the following error:

"There was a problem communicating with Google servers."

Is there an urgent or currently known fix for this issue?

Start by reproducing the failure in MicroG's Google account-add flow on the Huawei Pura 80 Pro, focusing on the final agreement step. Review the available account or authentication diagnostics around the "There was a problem communicating with Google servers" message. Done means identifying a reproducible cause and confirming a fix for custom-domain Google accounts.

Written by the indexing model from the issue text.