Comment # 2 on bug 1152720 from Henk van Velden

It is probably somewhere here:

D [02/Oct/2019:12:35:12 +0200] [Job 115] GPL Ghostscript 9.27: Unrecoverable
error, exit code 1
D [02/Oct/2019:12:35:12 +0200] [Job 115] Process is dying with \"Unable to
determine number of pages, page count: -1
D [02/Oct/2019:12:35:12 +0200] [Job 115] \", exit stat 3
D [02/Oct/2019:12:35:12 +0200] [Job 115] Cleaning up...