[v1.8.6] AttributeError - OpenNumismat/TabView.py:282

OpenNumismat: 1.8.6
OS: Darwin 19.5.0 (Darwin Kernel Version 19.5.0: Tue May 26 20:41:44 PDT 2020; root:xnu-6153.121.2~2/RELEASE_X86_64)
Python: 3.6.4 (64bit)
Qt: 5.9.2
Locale: en

Traceback (most recent call last):
File "OpenNumismat/TabView.py", line 282, in updateOpenPageMenu
AttributeError: 'TabView' object has no attribute 'collection'