10S1P issue - battery not charging
5V across 10 cells gives you half a volt per cell.

Using the pack details, 2.6Ah, 93.6Wh, that gives us a "nominal voltage" of 36V for the ten cells. So 3.6V per cell is nominal, so I think it would be a good guess that these are Li-Ion cells.

Assuming that these are li-ion rechargeable cells they are designed to be operated at voltages between 2.9-4.2V (there are variations on these limits depending on the cells, but this is a good rule of thumb). So we are looking at the cells being massively under voltage.

Under voltage cells should still charge up. But doing so can be dangerous, and so a well designed charging circuit should look at the cell voltage. If the cells are dangerously low (say under 2.5V or so) the charger does not charge them. And so the cells will stay dead.

This is for your safety. Dead cells can explode.

DO NOT ATTEMPT TO CHARGE THE CELLS. Yes, you could put a current source on the cells and try to revive them. I would not do this. Li-Ion cells are cheap compared to the risk.

Buy new cells or, better still, use your foot to power your skateboard.