Without any actual info about your project, your computer and at which point the error comes up we can't tell you anything. Just dumping some screenshots without further explanations is not useful to anyone.
You have an effect applied to that layer that will make it too big to calculate.
You can confirm this by disabling the effect and then try different settings or a different approach to see what does work.
What is the width and height of the Comp that you are trying to export? If it's larger than 4096, try nesting it into a Comp for export that is smaller than 4096-by-4096, scale it to fit, and then export. A safe size is 3140-by-2160 if 16x9 or 2160-by-2160 if 1x1.
The Screenshot suggest that the active Comp producing the error is set to 1920x1080 (1.0)
As you can see there is an effect applied to the selected Layer.
An error like this can occur when using an effect like Motion Tile that is set to expand beyond the 4096x4096 limit.
ps. how are we going to work with 8K material whit such limits!?
I checked, After Effects allows me to create comps up to 30.000 x 30.000 pixels (!!)
Now try to export that to MP4.
Yes, the user needs to find the setting that exceeds the amount in the error message and reduce it to below the amount indicated.
We have a lot to worry about when it comes to 8K. 7680-by-4320 comes to 253MB per 16bpc frame. That's just over 3GB per second at 24 fps. That shot that tracks movement across a wide panel just became a very hefty amount of data to process even with the existing resolution limits. Hopefully, by the time that AE expands all of its spatial resolution limitations we have lower-cost workstations that support terabytes of RAM and hundreds of terabytes of storage.
Perhaps we can rent remote cloud based workstations!
Anywayz, sorry we are getting way off topic 🙂
Quantum desktop computing should handle 12K footage just fine... when that finally rolls out.