Ambient Occlusion causes Warning and Errors

Today, all of a sudden, when I play the scene I have these messages flooding:
Warnings:
CommandBuffer: temporary render texture LinearDepth not found while executing Deferred Ambient Occlusion (SetComputeTextureParam)
CommandBuffer: temporary render texture LowDepth1 not found while executing Deferred Ambient Occlusion (SetComputeTextureParam)
CommandBuffer: temporary render texture LowDepth2 not found while executing Deferred Ambient Occlusion (SetComputeTextureParam)
CommandBuffer: temporary render texture TiledDepth1 not found while executing Deferred Ambient Occlusion (SetComputeTextureParam)
CommandBuffer: temporary render texture TiledDepth2 not found while executing Deferred Ambient Occlusion (SetComputeTextureParam)
Error: Thread group size must be above zero
Warning: CommandBuffer: temporary render texture Occlusion3 not found while executing Deferred Ambient Occlusion (SetComputeTextureParam)

And so on... I can copy the whole stack if it helps.


Ever occurred to anyone?

 

I think it's related to Post Processing stak. Is there a specific forum for that?