When I try to open the model in QGIS 3.16, it appears that only models in the new
.model3 file extension can be opened. Other models do not appear in the opening dialog and thus can't be selected. I tried to simply change the file extension, but that did not work. When trying to open it, I get an error:
model could not be loaded.
Is there a way to convert the model to run it in newer QGIS versions?