Error in Team Arena



I use the actual test build of ioquake3 (ioquake3 1.36 Git ebc7894) and got the following error in Team Arena, map “Base Siege”, CTF:

CG_RegisterItemVisuals: itemnum 294 out of range [0-51]

The error appears every time I try to get the plasma gun in this level. Is there a way to solve this issue?
I run ioquake3 on windows 10 64bit.

Thanks for your reply,