I ran into the same error and found the solution on this forum page: Ferroelectric job error - #4 by Bikash. Bikash explained that the error went away when he set {‘gzip_output’: False} in run_calc.py inside /atomate/vasp/firetasks at line no. 127. It has something to do with the Firetask not being able to find/pass the file when it is zipped.