Error while processing for DTM

Everytime i process DSM only, its all okay. But when I try DSM+DTM, it throws an error while processing. Does anyone know anything about this? I dont know if it helps, but it stops at this:

[DEBUG] running l2d_dems dtm /var/www/data/c688426b-86ab-44b3-b4bb-0abcc5cc4c51/odm_dem --slope 10 --cellsize 2 -o -s /var/www/data/c688426b-86ab-44b3-b4bb-0abcc5cc4c51/odm_georeferencing/odm_georeferenced_model.bounds.shp --outdir /var/www/data/c688426b-86ab-44b3-b4bb-0abcc5cc4c51/odm_dem --maxsd 2.5 --maxangle 20 --resolution 0.1 --radius 0.1 0.3 0.9 2.7 --gapfill

Possibly related: https://github.com/OpenDroneMap/WebODM/issues/385