We are getting errors when doing kinematic analysis using the spontaneous walking setup.

When we analyze a mouse walking right, we get this error:
OCN177_R1_DLC_resnet50_MouseModelFeb3shuffle7_1000000.csv

When we analyze a mouse walking left, we get this error:
OCN177_L1_DLC_resnet50_MouseModelFeb3shuffle7_1000000.csv

What is going wrong here could you please help us, thanks!