"This type was created in a different version" error on Illustrator CC2020 on macOS 10.13.6

I have Adobe Illustrator 2019 on my iMac (10.13.6 High Sierra) and the updated version 24.0.3 on my MacBook Pro (24.0.3 Catalina). I am receiving an error on my MacBook Pro when I open an ai file that was created last week in 2019 on my iMac. The error reads, "This type was created in a different version of Illustrator. Editing the text may cause some changes to your text layout. Basic formatting will not be affected. Do you want to continue?"

I spent an hour with tech support, and we downloaded previous versions of Adobe 2020 and 2019 to my MacBook Pro (24.0.3 Catalina) to see if the fonts on the ai file will work fine without changes in my text layout. Unfortunately, the previous version had the same issues. I had to go back on my iMac to open the file using 2019 Adobe Illustrator, and it works perfectly.

The tech support said that it did happening because the 3rd party font's driver is not up to date. I've been using this font on hundreds of my client's marketing materials for the last six years. It is a system font provided by Apple. I do not have the time to update every single ai file to fix this issue. The font's driver is not the problem, because it works perfectly fine with the iMac (10.13.6 High Sierra). This issue has to do with Adobe Illustrator's update, and I need this resolved immediately, please. Is it possible that Adobe Updates has a conflict with Catalina OS?

Also, I have to do a Force Quit on the Adobe Illustrator on my MacBook Pro all day today because it does not allow me to select menus such as Open or New Documents, etc.

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