Checking connection speed to server?

Server Version#: Latest
Player Version#: Latest
I recently installed Plex Media Server on my Pc to stream videos from the PC to either the PS5 or Smart TV. I instlled Plex on both PS5 an TV and both players find the server on my PC, but when I go to play any file on the player, either .mp4, .mkv or .avi it just comes up in the corner saying “checking connection speed to server” and then the yellow circle just buffers and nothing happens. Ive checked the firewall on my PC and it is allowed through that. So i dont know what else to check. Ive gone through all the forums and tried different things to adjust on the settings, but nothing is working.

Please can anyone help???

Same here, keep getting the Checking connection speed to server since the password reset on my smart tv

If I unable the setting Quality Suggestions I can connect buth picture is a very low resolution and not pretty to watch

Checked and double checked everything but cannot reolve this issue

Some help would be nice

Installed an earlier version of the media server which has cured the problem on one tv but not the others. I know it is not a good idea using older versions but it is the only way at the moment to get a watchable picture. Need help ASAP please