I found this error while rendering with the plugin math_check_online, wich didn't work. The other part of the renderer worked properly.
Traceback (most recent call last):
File "/usr/lib/python3.5/multiprocessing/process.py", line 249, in _bootstrap self.run() File "/usr/lib/python3.5/multiprocessing/process.py", line 93, in run self._target(*self._args, **self._kwargs) File "/home/riccardo/texla/texla/Renderers/plugins/math_check_online.py", line 55, in start_pool pool = Pool(processes=int(configs["threads"]))
KeyError: 'threads'