Hmm, this error message is indicates that an assertion has failed in the PPM file. An assertion is basically a statement that verifies that the conditions specified are true; if they are not, the program will halt and report an error.
It seems that the code is expecting the inputs “Material”, “MaskMaterial”, or “CaptureRegionMaterial” to be present, but one or more of them is missing. This is likely the cause of the crash. You may need to debug the code or provide the missing inputs in order to resolve the issue.