I have recently set up a Mattermost server for my friends and myself. Unfortunately I am currently facing a strange problem.
I received a message that there are no push notifications on my friend’s phone. He uses an Android phone with LineageOS 17 ROM without any Google services.
He has both Mattermost Apps (Mattermost & Mattermost Beta) installed. But he does not receive any notifications on either.
On my Android phone, as well as on all others, everything works. Also the desktop clients work correctly.
Other apps notify him normally. It’s only the Mattermost apps that don’t work.
He has already reinstalled the apps several times and cleaned his active sessions before every reinstall.
We have also already checked his Android permissions and battery settings. They are consistent with other working apps.
can this be a problem of missing Google services?
is there anyone who might be able to help me with this?
Thank you very much.