API request not found in workflow

https://arkindex.teklia.com/imports/a5b445c7-2416-4a71-8d61-fbc618634965

how to reproduce :

https://arkindex.teklia.com/element/23b5054e-a898-4f31-bf64-efddde26af26

create workflow et ne sélectionner que la création de thumbnail.

run sur 1 cpu;