BRAKER1 crashes due to "invalid regression data"

[Macspider]

This is what my BRAKER1 run throws out when crashing:

failed to execute: perl /software/genemark/GeneMark_ES_ET_4.32/gmes_petap.pl --sequence=/../genome.fa --ET=/../hintsfile.gff 1>/../GeneMark-ET.stdout 2>/../GeneMark-ET.stderr

If I read the 1> file and the 2> file, the stdout one has a suspicious line:

error on call: /software/genemark/GeneMark_ES_ET_4.32/parse_ET.pl --section ET_C --cfg /../run.cfg --v

And so does the stderr file:

Use of uninitialized value in addition (+) at /software/genemark/GeneMark_ES_ET_4.32/parse_ET.pl line 265.
Use of uninitialized value in addition (+) at /software/genemark/GeneMark_ES_ET_4.32/parse_ET.pl line 266.
Use of uninitialized value in division (/) at /software/genemark/GeneMark_ES_ET_4.32/parse_ET.pl line 266.
Must input more than one data point! at /software/genemark/GeneMark_ES_ET_4.32/parse_ET.pl line 213.
Invalid regression data

That "must input more than one data point!" is what I don't understand.

Any help is appreciated!