Hello and thanks for the effort put in your response!
I want to tell you that the first suggestions didn't work as well. I tried reinstalling the browser as well but the same issue persisted. What I tried next was to install the extension. The name wasn't the most "friendly" one but since Windows Defender Center also confirmed that it is fine I think I can trust you and the extension.
It worked after I changed it to reinforce but resetting it back to default behavior kept the error as well. Therefore I will keep using the reinforced option checked.
Thanks a lot!