Apex Legends Instruction at * referenced memory at * Memory could Not be Read

Hi, 

I'm crashing during random points in the game. Sometimes upon dropping from the airship, sometimes in the middle of the game, sometimes at the win screen.

I'm using windows 7, i5 6500, RX480 8GB. I've also attached my dxdiag file.

I've gotten different error codes, one of them being "The instruction at 0x3fefdab7 referenced memory at 0xffffffff. The memory could not be read".

Does anyone have a solution? thanks