I don't see any errors that should have effect on jetways.
Surely you seem to have two identical parking names ( the 121 ) in your GSX profile, and it seems the GSX.CFG file for the A320 FBW seem to use an unusual encoding. If would be helpful if you send me the .CFG file ( ZIPPED, please ), it's likely unrelated, but it's something we would like to fix.
Have you tried other parking positions ?