lpapp: did you try removing the offending lines? the main problem is that your local Qt does not have those QCbor* signatures for some reason, so shiboken is complaining you have them on your typesystem. In case you do have those signatures, and they are not being detected, you'd need to report a specific bug on that, but I do recall that that was a Qt/C++ issue at some point. Did you check if the functions exist in your local Qt?
lpapp: if you have any '_Check' function alone, there is something wrong with your typesystem, because that usually generate Type_Check functions based on the signature of your modules. I'd recommend you to look on the current typesystem files, and find a similar function that might behave as the ones you are trying to expose.