Fix Auto-save function
MacOS Big Sur
Auto-save is enabled ”next to project file”. However there were no autosaved project files at all.
Rendering of project file was frozen out after 2 hours (estimated total render time was 17 min).
Have to redo the project. Really disappointed and unreliable product.

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Hi Laszlo, sorry to hear this. Did you see the folder for "Adobe After Effects Auto-Save" created next to your project, or did that not happen?
I'll forward this on to our QE. If you are able to share the project with us, that may help them to diagnose what is happening. Which version of AE are you using?