A hint for anyone googling for this: make sure that the value of gcmSenderId in your AndroidManifest.xmlstill has the trailing backslash (\) after you’ve changed the project number to your own. Otherwise the value gets interpreted as int, when it should be a string, which is one way to trigger the issue of devices being assigned empty/null IDs.

(The building instructions do have this documented in bold, but it’s still very easy to miss, I know I did. Complicating the debugging was my Nexus 5X, which kept getting a proper device ID even when all other devices using the same broken build failed to.)

@juliushaertl Is backporting for docs also done as per the manual? It seems pretty straightforward, so I think I can produce those pull requests too, if needed.

Fix indefinite article before Nextcloud (an->a)

Sorry for necromancing, but because Google seems to like this thread, I just thought I’d add a mention that a check_data_directory_permissions option for config.php has since been implemented (and backported down to NC12), and it allows the admin to turn off the automatic permissions reset (by assigning it false).

This is discouraged however, and ACLs or other means of managing access are still the better option where available.

Thanks for the explanation, I was looking at North Europe thinking: Norway, what’s wrong with you?!

Fix typo: ”parameters and are” -> ”parameters are” in Using the occ command.