Describe the bug
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'

To Reproduce
Run Zenmap -> Tools -> Compare Results -> Open scan A -> select XML file-> Open scan B select XML file. After that the issue is.

Expected behavior
Expect to output coloring diff of ScanA and ScanB.

Version info (please complete the following information):

• OS: Windows 10 Home 22H2 19045.5555
• Zenmap Version: 7.95
• Nmap version 7.95 ( https://nmap.org )
  Platform: i686-pc-windows-windows
  Compiled with: nmap-liblua-5.4.6 openssl-3.0.13 nmap-libssh2-1.11.0 nmap-libz-1.3.1 nmap-libpcre2-10.43 Npcap-1.80 nmap-libdnet-1.12 ipv6
  Compiled without:
  Available nsock engines: iocp poll select