Player getting error, not able to access client.

[Halcyon2003]

63573
Trying to start my weekend session and one of my players is getting this error message and is unable to get into the game. I have used a shield damage tracker extension for PF2e Legacy up to now but after deactivating it and reloading it the player still gets the same error.
Other players don't seem to receive the same error, or if they do they just need to wait about 7 minutes and the game loads just fine.

[LordEntrails]

I've never seen those unexpected command messages at the start. But your log is still showing 3 extensions loaded. Maybe this isn't the correct log.
But this one is showing errors that seem to be related to your extensions. Just verify that you tried with all extensions disabled :)
Can you get the log file from the player to see what messages they are getting?

If other players are taking 7 minutes to connect, then if could just be that the one player is not waiting long enough. To cut down on those times, I would suggest unsharing images that you no longer need.

[Moon Wizard]

Try having the user open the FG data folder (via folder button in upper left of FG launch screen), go to cache folder, then delete the subfolder for the campaign you are running.
If they are the only one getting errors, perhaps their cache folder got marked read only by another program on their machine, or is otherwise not being able to be edited by FG.

Regards,
JPG