WebDAV became unusable

I initialized my server and restored the data (the entire Nextcloud). Then I could not use WebDAV.

Your web server is not yet set up properly to allow file synchronization because the WebDAV interface seems to be broken.

I’ve heard that Nextcloud certainly adopts its own WebDAV. Where should I adjust?

CentOS: 7.3
PHP: 7.1.7
Plesk Onyx:17.0.7
nginx: 1.11.10

pls install app “issue template” from app-store, fill in all missing data and copy&paste it’s output here so that we have a realistic chance to help you

It seems time has been settled. I do not know the reason, but the error suddenly disappeared.