It MUST be a problem within kdepim/akonadi-google-resource. Why:
I have installed too Manjaro Linux AND Debian Testing (both in virtualbox). Same result -> no syncing nor calendar neither contacts of my google-account.

Yes, there seems to be no easy solution for now. Quoting from a recent
email to kde distributions list

as you might have seen. Google killed one API that Akonadi was using to retrieves the contacts.
This completely breaks the Akonadi google resource as it expects the API to still work.

While a solution doesn't exist yet for this, a workaround exists: disabling the address book
feature for the google resource. This will unbreak at least the calendar part.

That means we need to patch kdepim, that will disable address book
integration, but at least get the rest working again.

Best

Norbert

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PREINING Norbert https://www.preining.info
Fujitsu Research + IFMGA Guide + TU Wien + TeX Live
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Hallo Herbert,

a workaround exists:
disabling the address book feature for the google resource. This will unbreak at least the calendar part.

Is this a notice for Debian-developpers or for end-users like me ? -> How can I disable the
addressbook feature for the google resource ?

Not to end-users but to the maintainers in the distributions.
You would need to recompile the package - something I don't recommend.

Greetings from Austria

Liebe Grüße in die Heimat

Norbert

--
PREINING Norbert https://www.preining.info
Fujitsu Research + IFMGA Guide + TU Wien + TeX Live
GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)