I think this is ttf file problem.
Any other ttf file doesn’t have any problem.
I thought it is too big to load, but ttf file which is bigger than this works fine.
and you cannot upload those files to the assets. (After uploading ttf to the assets you can see it in the assets, but try to export the aia, then you will find out that this file is NOT included in the assets.)
So you must add them via 7-Zip or winRAR to the assets and import this aia then.