TypeError: Unit "kilocalorie/mole" is not compatible with Unit "kilojoule/(nanometer*mole)".

[MQM1608]

I'm running your sample code from section "Refinement with OpenMM" but it get error "TypeError: Unit "kilocalorie/mole" is not compatible with Unit "kilojoule/(nanometer*mole)"."

[chen10089]

I use opemm=8.0.0 solve the problem.