Question about SVF

[htsltiago2021]

I have an error when I try to create the SVF for my area.
What may be occurring?

Thank you

The error is as follows:
2021-03-21T18:40:40 WARNING Traceback (most recent call last):
File "C:/Users/.../AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\UMEP\DSMGenerator\dsm_generator.py", line 645, in start_progress
dsm_array = np.array(dsm_raster.ReadAsArray().astype(np.float))
AttributeError: 'NoneType' object has no attribute 'ReadAsArray'

[biglimp]

This error is not coming from the SVF-calculator but from DSMGenerator. What is your error from SVFCalculator?