ILLEGAL: l c8-c2 on turn 3:
There was no l on c8. The piece on c8 is a .cv.
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For diagnostic purposes, here is the full movelist:
1. P d2-d4 
1... p d7-d5 
2. AAN d1-f4 
2... aan d8-b5 //check
3. EE f1-b5 
3... l c8-c2 
4. AAN f4-c2 
4... p c7-c6 
5. EE b5-d3 
5... cp b8-b6 
6. L c1-e3 
6... k e8-d7;A10-d8 
7. L e3-g5 
7... _jj_lwm g8-g5 
8. g1-g5; A1-c1 
8... p g7-g6 
9. AAN c2-f4 
9... p e7-e6 
10. _JJ_LWM g5-g7 
10... q.n d8-e7 
11. _JJ_LWM g7-e7 
11... k d7-e7;B10-e8 
12. Q.N c1-c5; B1-g1 
12... cp b6-d6 
13. CP b1-c2 
13... p h7-h5 
14. P e2-e4 
14... p h5-h4 
15. P e4-e5 
15... p g6-g5 
16. AAN f4-g4 
16... nn e8-g4 
17. C1-c1; c2-e4 
17... p d5-e4 
18. _JJ_.EEFF c1-g5 
18... k e7-e8;C10-b8 
19. SP a1-c1 
19... p e4-d3 
20. c1-f4 
20... cp d6-f4 
21. Q.N c5-e7 
21... resign
In case there is a bug in the code, the settings file can be edited at /play/pbm/play.php?game=Universal+Chess&settings=Alfaeries&submit=Edit