Hello all,
I hope everyone is fine, i i have this error, and i do all solution in forum or webpage nextcloud, and no resolve, have some ideas to resolve it 
Your web server is not properly set up to resolve “/.well-known/webfinger”. Further information can be found in the documentation 
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Your web server is not properly set up to resolve “/.well-known/nodeinfo”. Further information can be found in the documentation .
Your web server is not properly set up to resolve “/.well-known/caldav”. Further information can be found in the documentation .
Your web server is not properly set up to resolve “/.well-known/carddav”. Further information can be found in the documentation .
thank you