Before upload operations, the Nextcloud Android app checks whether it can reach the server by querying index.php/204 and aborts the upload when it receives no response (or an 404 error from karadav, apparently).
Implement this endpoint in karadav and just return status 204.
Before upload operations, the Nextcloud Android app checks whether it can reach the server by querying index.php/204 and aborts the upload when it receives no response (or an 404 error from karadav, apparently). Implement this endpoint in karadav and just return status 204.