Hi,
I cannot tell from the screenshot, what are the types of the objects. E.g.
self.uuid - this should be the GUID, not just a string with UUID. You can convert string to GUID with FromString
Also, I think that what comes in the execute call is not correct. Have a look at this example. After modify_uuid_list you give True, but you should give a ReinforcementRearrange object. And this only if you really want to rearrange something, this argument is optional. In fact, all the arguments after modify_uuid_list are optional. I would suspect, here's where the error may be.
From the screenshot I can tell that the Python language server does not work in your IDE. Otherwise, it would report this error to you immediately, before you even run the script. Please watch the getting started video and go through the chacklist in the point 4 in the getting started article. Although we work with Python, the function you call in the end are calling underlying C++ functions of ALLPLAN application. C++ is a strongly typed language, so the type must also be correct in the python layer of your script. I recommend to turn on the type checking in your IDE.
Cheers,
Bart