Webdav not working (Win) - after attempt no access to website at all

Nextcloud version: 22.2.0
Operating system and version (eg, Ubuntu 20.04): server: no idea (hosted) - local: Win10
Apache or nginx version (eg, Apache 2.4.25): no idea
PHP version (eg, 7.4): 7.4

The issue you are facing:
trying to access Nextcloud with Win fails - however under security it seems like Nexcloud sees my attempt …
However what’s the real issue: after some attempts my network blocks everything connected to my hosted server and even some of the providers webpages. Even with my cell phone I cannot access the webpage through wifi, with mobile data I can.
It seems like I cannot access anything that is connected to this IP. To tell the whole truth: I am using a Raspberry with Pihole but I cannot see how that could be connected. I can resolve the domain name with ping.
However at work it was the same thing: other network, other computer.

At home I tried to get a new IP adress by reconnecting the router: no change, still no access

Is this the first time you’ve seen this error? (Y/N): No

Steps to replicate it:

  1. some attempt to connect to Nextcloud
  2. attempt to access webpage

The output of your Nextcloud log in Admin > Logging:
nothing

The output of your Apache/nginx/system log in /var/log/____:

probably won't be able to access that - will try once I got my access back - I guess that will take 12-24h - at least last time it was like that.

contacted my serviceprovider. Somehow my IP was locked …