Were humans present when Pangaea was in existence?
No, no species that can be related to Humans existed during the Pangea period.
Modern humans (Homo Sapiens) evolved around 200,000 (two-hundred thousand) years ago.
The first phases of Homo developed less than 2,000,000 (two million) years ago.
Pangea , the supercontinent existed approximately 335,000,000 (three-hundred thirty five) years ago.
It would be impossible for any species that even slightly classify as humans to exist during the same time as Pangea did.