lyx --export latex someFile.lyx outputs loads of errors, with this pattern:
Traceback (most recent call last):
File "/usr/share/lyx/scripts/convertDefault.py", line 38, in <module>
output = output.decode()
AttributeError: 'str' object has no attribute 'decode'
PLease consider applying the attached patch, which fixes those errors.
This should be fixed since lyx 2.3.3. Pavel
Closing, 2.3.6-1 with the fix is in the archive.