The issue is caused by an update to the Home Screen feature in AE. There is a fix rolling out. In the mean time, if you can open a project by double clicking the aep file to start AE, that will avoid the crash. Once into AE, if you go to Preferences -> Startup and Repair, and uncheck the Show Homescreen option, that should avoid the problem as well.
/t5/after-effects-bugs/after-effects-23-6-crashes-while-opening-error-0-42/idc-p/14133483#M6560Oct 04, 2023
Oct 04, 2023
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@Northon Souza It means that your CPU doesn't meet the requirements for the version of AE you are attempting to run. AVX is a hardware feature of CPUs and is required for AE. Starting in AE 24.0, you will need a CPU with support for AVX2.