When updating PyQt5 to the newest version, the following RuntimeError is presented when trying to open Reel.

Opening Reel 1.0...
Traceback (most recent call last):
File "Refinement_evaluator_ver1.0.py", line 19, in
from PyQt5 import QtCore, QtWidgets, uic, QtGui
RuntimeError: the sip module implements API v12.0 to v12.8 but the PyQt5.QtCore module requires API v12.9
Press any key to continue . . .

Downgrading to 5.14.2 solves the issue