Type: unauthorized Detail: Invalid response from

really strange. I didn;t change anything yet in the server or DNS. Few minutes ago I tried to enter:
http://mysite.pl/.well-known/acme-challenge/wc7Romm8QfnvUMxqn4YnSm48XNeOHGkyvmGPA_8Yb4Q

and got redirected to https://myanothersite.pl/.well-known/acme-challenge/wc7Romm8QfnvUMxqn4YnSm48XNeOHGkyvmGPA_8Yb4Q

Then I tried to enter:
http://mysite.pl/.well-known/acme-challenge/
and got redirected to:
http://myanothersite.pl/.well-known/acme-challenge/

Then tried to enter:
http://mysite.pl/.well-known/
and got forbidden

Then tried to re-enter http://mysite.pl/.well-known/acme-challenge/ and got forbidden too

Then I tried to re-enter http://mysite.pl/.well-known/acme-challenge/wc7Romm8QfnvUMxqn4YnSm48XNeOHGkyvmGPA_8Yb4Q and this time I got the page, there was some text of my site, but no graphics.

I run again certbot onlycert and this time I get a different error (see the mysite and myanothersite:

Failed authorization procedure. mysite.pl (http-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: Fetching https://www.myanothersite.com/.well-known/acme-challenge/SieNH_Wxxj0Yo5p1m559ZovGZ2Kco8Q2K4Yzp_-_CP0: Timeout

IMPORTANT NOTES:
 - The following errors were reported by the server:

   Domain: mysite.pl
   Type:   connection
   Detail: Fetching
   https://www.myanothersite.com/.well-known/acme-challenge/SieNH_Wxxj0Yo5p1m559ZovGZ2Kco8Q2K4Yzp_-_CP0:
   Timeout

   To fix these errors, please make sure that your domain name was
   entered correctly and the DNS A record(s) for that domain
   contain(s) the right IP address. Additionally, please check that
   your computer has a publicly routable IP address and that no
   firewalls are preventing the server from communicating with the
   client. If you're using the webroot plugin, you should also verify
   that you are serving files from the webroot path you provided.

Btw. If I try to enter the test file I put there, it always works well:
http://www.mysite.pl/.well-known/acme-challenge/test.txt

Any idea?