I used to access the forums through my laptop browser and through Tapatalk. Since about Dec 2017 or so, I find that I can't connect using Tapatalk. I've been logged out from Tapatalk for only the Hifivision site. (I still access four other forums including DIYAudio and Parts-Express forums, using Tapatalk.) Whenever I try to log in through Tapatalk onto Hifivision, I'm told there's a "Network error".
Note that I am not told that my credentials are incorrect. I'm always told that there's a "network error".
What is going on? I'm posting this from my laptop browser, where my login session has remained active for several months.

Note that I am not told that my credentials are incorrect. I'm always told that there's a "network error".
What is going on? I'm posting this from my laptop browser, where my login session has remained active for several months.