Can't bake in Render (or UV map) All of my textures are showing up on the texture viewer and correctly assigned, however it won't let me bake. I'd like to bake to an ambient occlusion, to add some shadows, but it won't let me, saying 'no image or textures found'.

Here is the .dae file :

https://ufile.io/5o0tr

Thanks!
Observing the dae file I found the UV-Map to be unsuitable for baking because it overlaps on itself, so I followed How do I bake a texture using Cycles bake to bake with cycles, which worked quite well.

Starting with imported .dae, UV-Unwrapping, setting up the bake target.

Node setup, render setup and intial render process.

Finishing the render finding overlaps, reducing overlap size

Final render

Complete workflow