@leocg Ok. But how other sites are loading easily, like fb, twitter, lichess etc...

@leocg How to allow opera to access the internet?

Some sites in opera showing the error this site can not be reached. But those sites are loading easily in other browsers, like firefox. Another issue is I can not connect to opera built in vpn. It is showing vpn is temporarily unavailable, opera is resolving this issue.
Help me to fix these issues.