Safari
Unable to use safari, as it constantly is unable to find server,
MacBook Pro 13″, macOS 11.2
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1. Deselect Proxies, if selected.
System Preference > Network > Advanced > Proxies Tab
Unlock the lock if you have to.
Under "Select a protocol…”, uncheck any box if check-marked.
Click "OK” then "Apply”.
2 If you cannot open a website
https://support.apple.com/guide/safari/if-you-cant-open-a-website-ibrw1071/mac
3. If you cannot still connect to internet:
Startup in Safe Mode. https://support.apple.com/lv-lv/HT201262
Login to your account. Launch Safari and test.
Click in the menu bar and choose “Restart”