I can connect to mailbox.org and my self-hosted Nextcloud using both the integrated WebDav client and Davx5. I have actually set up my own Nextcloud using the Murena account.
However, when I want to use one of the two WebDav servers on Seedvault, whether set up via the integrated WebDav client or via Davx5, I always get the generic error message “Backup failed.”
I can’t find a useful solution for this on Gitlab or anywhere else on the internet.
do you run nextcloud in php-fpm behind an nginx? they can’t do chunked uploads. Apache can. See this entry (seedvault issue got deleted, probably disclosed some token, but this commit alludes to the issues).
Frankly I need to test seedvaults own webdav implementation, have no 1st hand experience of it yet.
If that doesn’t fit you I’d look at the access.log while you run a sync
I didn’t fully understand that sentence. You have 2 remotes, mailboxorg and your own selfhosted (you say Apache, but the murena nextcloud selfhost package would run nginx).
if you check adb logcat while the seedvault error is shown you might get more output. Atm I cannot recommend using webdav as Seedvault backup target, only sdcard / local, and sync from there with another App outside Seedvault