Error: Could not connect to the server (Code - 1004 domain NSURLErrorDomain)

[13Nina]

While browsing, I've spotted that I get the error at some websites like instagram.
I only get the error when I use Wi-Fi, when I'm browsing using my mobile internet - I do not get such error.

[tladesignz]

Well, in that case, I guess that's an issue with your home setup. In general, when googling for this error, a lot of mentions come up, so it doesn't sound like it particulary has to do something with Onion Browser.

E.g. see here for some general steps to bugfix:
https://discussions.apple.com/thread/255366443?sortBy=best