Same issue here. Nothing get delivered even selected and delivery guys route shows green, but no merchandises loaded and no income... Started fresh skipped prologue and build necessary facilities and hire workers.

Just double checking - does the worker have the "load truck" action checkmarked?

In my experience, so long as 1.) that is checkmarked, 2.) they're on a work schedule (not on break), and 3.) they have not begun some other job (such as watering plants), then someone will take the drug to the vehicle, so long as the vehicle is marked for that particular drug type (by default, vehicles are marked for all drug types).

Where should load truck action should be found exactly?
Made schedules with work, pause and free time. Storage's are full of merchandises and workers wandering around and looking for work but not load vehicles. Had door next to garages. Rooms are setup as should.

Originally posted by Bentorium:

Where should load truck action should be found exactly?
Made schedules with work, pause and free time. Storage's are full of merchandises and workers wandering around and looking for work but not load vehicles. Had door next to garages. Rooms are setup as should.

Where you select the various drugs on the workers schedule... one of the last one looks like a truck, make sure that one is checked otherwise the worker won't load.