Have been using AI 2022 on my M1 Mac Mini and on a 13" M1 MBP since this version was released without this issue happening.
Just sold my 13" MBP and got a 14". Installed CC and with a large number of AI files, which are shared via iCloud, when I try to open them on the 14", I get the message "The file "244148789.ai" is in an unknown format and cannot be opened." If I copy the file over to the Mac Mini, AI can open it without a problem there. Same version of AI: 26.0.1
Thought it might be a permisions issue on the new laptop but I have read & write permissions for the files. Uninstalled AI and re-installed but no change. Also reset preferences, ditto.