Matlab: Error using load Unable to read MAT-file. Not a binary MAT-file. Try load -ASCII to read as text

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I have a Matlab file, A.mat, saved in a Dropbox folder in my mac (macOS Monterey version 12.5.1). I open Matlab (R2022a), go to this folder, and run load('A.mat'). I get the following error:

Error using load
Unable to read MAT-file /Users/.../Dropbox/Folder/A.mat. Not
a binary MAT-file. Try load -ASCII to read as text.

When I try the same command in another computer of mine, it works perfectly. I've tried to uninstall and reinstall Matlab and get the same error. I think it may be related to the fact that the file is in a "cloud" (Dropbox) but I don't understand how to fix the problem. Any help?

Same issue reported here but I could not understand the solution.

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