August 2020
While the team continues to look into this, can you try the steps here and see if they help?
https://answers.ea.com/t5/Technical-Issues-Mac/Re-Sims-4-Initialization-error-at-startup-Legacy-Edit...
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August 2020
No, it didn't work. I remember trying this some times ago (when the LE issues started) and it has worked at this time. I tried it again without success.