I have 15 submissions (1 per each of 15 students). I am choosing Random Allocation, and had to go back, to remove the Visible Group setting, in the Course. I chose No Groups because there are no groups. I now am back in Random Allocation, and I see Allocation done, but then also trying to allocate, And no indication of work in the background, no hourglass, no spinning circle, nothing to indicate working. Here is a snip, with the listing Moodle-attempted of names and allocations removed.
When I click on continue, or save, , I am back to the beginning Random Allocation screen, and do not see that the allocations happened. I am in endless loop.
Oh, the green part and the listings that don't show turned blue. Then, Moodle put be back at the Random Allocation page, with options to save or continue. Instead of endless looping, in Save and Continue, I clicked on the Workshop, navigation pane, then switched phase to Allocation. Looks like allocations were finally done, I assume indication was the change from green to blue?? Heck of a lot of trial and error here, not explained in docs.