Traceback (most recent call last):
File "/usr/share/frescobaldi/frescobaldi_app/qpageview/highlight.py", line 209, in paintEvent
super().paintEvent(ev) # first paint the contents
File "/usr/share/frescobaldi/frescobaldi_app/qpageview/shadow.py", line 43, in paintEvent
rect = ev.rect().adjusted(-width, -width, width / 2, width / 2)
TypeError: adjusted(self, int, int, int, int): argument 1 has unexpected type 'float'
Please remind me how one submits a bug report.
Andrew
This is already fixed in Frescobaldi 3.2. Maybe that's not yet in Ubuntu; it's caused by incompatible changes in Python 3.10.

I've just git cloned the repo instead.