#55 java.lang.ClassNotFoundException: align2.BBSplitter

[Muku]

I am using bbmap/38.96 to run bbsplit.
bbsplit.sh build=1 threads=12 ref_x=$ref_Human ref_y=$ref_Mouse path=$indexded_ref

I am running into error:
Error: Could not find or load main class align2.BBSplitter
Caused by: java.lang.ClassNotFoundException: align2.BBSplitter
srun: error: b001: task 0: Exited with exit code 1

Is there a way to solve this issue ?
Thank you.