Cannot add Google account to microG on fresh install

• /e/ version: 0.22-r-20220307169166-stable-emerald
• Device model(s): Teracube 2e
• Device rooted: ? (brand new Murena Teracube 2e)

Summary

Cannot add Google account to microG; "There was a problem communicating with Google servers."

The problem

Steps to reproduce

1. Go to Settings > System > Advanced > MicroG > Account (Add Google Account)
2. tap "Sign In" button
3. input e-mail > tap "Next" button
4. input password > tap "Next" button
5. tap "I agree" button (legal terms/policies)

What is the current behavior?

"Sorry... There was a problem communicating with Google servers. Try again later."

What is the expected correct behavior?

Successfully added Google account to microG.

Technical informations

Relevant logs (adb logcat)

I don't know where to get these logs. See my reply below for logs.

Relevant screenshots

Solutions

What I tried

• Brand new Murena Teracube 2e purchased straight from /e/ store.
• Never installed a SIM or MicroSD card.
• Just changed a few Android settings and created an /e/ account and updated /e/ OS.
• In microG I tried to turn off the three settings (Device Registration, Cloud Messaging, SafetyNet).
• MicroG Self-Check has all boxes properly ticked.
• I also tried to Disable MicroG in Android Apps, and also to clear its Storage&Cache data.
• When I re-try to add my Google account after that MicroG data cleaning, I also get a notification in my Google account that I logged into a new device, as if it had worked: "A new sign-in on Teracube 2e. We noticed a new sign-in to your Google Account on a Teracube 2e device. If this was you, you don’t need to do anything. If not, we’ll help you secure your account."

Workaround

None?

Possible fixes

No idea?