Hi Shaun. Can not see the image, may not have added it correctly to the post.
Anyway, as to the error, I'll take a stab and guess it was an unhandled exception error. If this is the case, it is common in the FT mod if a player has to download a map for the next round. It doesn't always happen but when it does, just rejoin the server. Between rounds, I suggest you don't touch your keyboard, push keys, etc. between rounds.
Just a note, that when re-joining, the player may get a duplicate q port error. This is also common after an abrupt kick like this as the players name/guid may no have cleared right away from the master server. This could take a minute or 2.
Hope this helps. If it was something different, post back and we'll get you sorted out.
Cheers and welcome to the team Shaun.