Error while processing TrackObjects: (Worker) AttributeError: 'MaskedConstant' object has no attribute '_fill_value'


I am quite new to Cell Profiler and managed to run the example TrackObjects pipeline. However, when I try to run the same example as given here on my own data I get the error as mentioned in the title. I thought it is something to do with ‘Fill holes’ parameter and checked it to ‘never’ but I don’t think so this is the problem. I did not change any other parameters except for names, min-max diameter for example.
I have a set of time sequence images in tif, similar to the example data provided in the tutorial.
Thank you in advance!