Stop the machine and wait for the drum to fully stop before opening it.
If all clothes are stuck on one side, the machine may stop spinning to protect the drum.
Rearrange the clothes evenly inside the drum so the weight is balanced properly.
Make sure the machine door is fully closed. Many machines will not spin if the door is not locked properly.
Start only the spin mode and check if the drum spins normally. If not, technician help may be needed.
Do not overload clothes and always spread heavy items evenly for smooth spinning.