teamchange failed

[ChillerDragon]

^@^@[18:37:55][server]: player is ready. ClientID=15 addr=84.XXX.XXX.XXX:58675
^@^@echo "[WARNING] UnicodeDecodeError! Please contact an admin."
[18:37:55][server]: cid=0 cmd='echo "[WARNING] UnicodeDecodeError! Please contact an admin."'
^@^@[18:37:55][Console]: [WARNING] UnicodeDecodeError! Please contact an admin.
^@^@[18:37:55][server]: player has entered the game. ClientID=15 addr=84.82.88.251:58675
^@^@say "[ERROR] teamchange failed id=15 data=[game]: team_join player='15:flappie' team=1"
say "  id=12 name='e6aJloBcblPe'"
say "  id=6 name='Who'"
say "  id=3 name='ChillerDragon'"
say "  id=10 name='Spulae Mulae'"
say "  id=8 name='Whis'"
say "  id=2 name='Cap'tain roc'"
say "  id=0 name='Ponny'"
say "  id=5 name='naamloos tie'"
say "  id=7 name='nameless tee'"
say "  id=11 name='Soleil'"
say "  id=13 name='Swap'"
say "  id=1 name='teeless name'"
say "  id=4 name='Stechus Kaktus'"
say "  id=9 name='martinus magnus'"
[18:37:55][server]: cid=0 cmd='say "[ERROR] teamchange failed id=15 data=[game]: team_join player='15:flappie' team=1"'
^@^@[18:37:55][chat]: *** [ERROR] teamchange failed id=15 data=[game]: team_join player='15:flappie' team=1