Zenmap crash on comparing two Nmap scan results

[BassenRift]

After having initiated a comparison of the results of two „intense scans“ of IPv4 addresses Zenmap shortly after start of the procedure crashed providing me with the crash report as shown below.
For me it not clear whether this is a phenomenon of Zenmap or could also be triggered externally as the scan results of the IPv4 addresses I intended to compare indicated a pontential MitM taking place on my wired part of the network.

OS: Windows 10 Pro Version 10.0.19045
Zenmap 7.95 & Nmap 7.95
network: Ethernet connection

Crash report output by Zenmap:

Version: 7.95
Traceback (most recent call last):
File "C:\Program Files (x86)\Nmap\zenmap\lib\python3.11\site-
packages\zenmapGUI\DiffCompare.py", line 380, in check_ndiff_process
stderr = self.ndiff_process.stderr.read().
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError:’NoneType’ object has no attribute ‘read’

Thanks for any information on how to fix this issue and/or getting info on the causes.