Erase / remove borders from a table (scanned pdf)

[odeonseb]

Hello,
I installed the ofn-remove-grid script and use these values in the windows on the picture:
Grow selection before: 0
Area threshold: 19400
Grow selection After: 1
Work is processing "selection to path" and an error appears "Remove table/grid around text Message / global name 'BUCKET_FILL_BG' is not defined".
The native langage in Linux Mint is French. Can this disturb the script?
Do you know what I should do to solve this?
Thanks