As an admin/creator of a competion I go to the submissions tab where I use the checkboxes to select all submissions (of a phase). The "Delete Submission" button stays greyed out.
However I can use the icon in each row to delete each submission individually.
I do not see any reason why it should not be possible to use the delete submissions button to delete them all in one go
Seems this was a temporary fluke, after going back to the tab I was able to delete all submissions using the delete button. Maybe it was slow javascript in my browser or something. Closing this.
As an admin/creator of a competion I go to the submissions tab where I use the checkboxes to select all submissions (of a phase). The "Delete Submission" button stays greyed out. However I can use the icon in each row to delete each submission individually. I do not see any reason why it should not be possible to use the delete submissions button to delete them all in one go