Error with tutorial 8: Electrical Mismatch Method

[EstrelaStern]

Hello,
I ran the eight tutorial but got an error for mismatch analysis:
ValueError: array of sample points is empty

According to what I read on #445, I changed the moduletype to PVmodule but I got this new error : ufunc 'bitwise_or' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''.

Does someone know how to overcome this issue, please ?

Thanks.