Arduino reboots when connected to ESP

I’ve connected my arduino uno to an ESP 201, but randomly my arduino reboots. Nothing wrong occurrd before, and if I disconnected them, it’ll run with no problem.

Anyone had this prolem before?

Do you need wiring/ schematics ?

It would help a lot to see what you have connected between the two devices. Also, anything else that’s connected to either device. What are you using to power the devices?