Plex is not Reachable

Hello All,
Past couple of days I’m unable to login into my Plex account. However so long as i don’t use my Wifi I can log into my Plex App on my phone. The error received from my browser using app.plex.tv as shown below.

Any suggestion on how to fix this would be appreciated

Are you with AT&T ?
If so, see AT&T Fiber Internet Blocking Plex login

@OttoKerner Yes