Thats not the fst export though. That’s the Scene Json export, not export avatar fst..
You should probably increase the font size in Blender so that you can read them: You can do this under Settings > Interface > Scale to make the readability easier (as you’ve said in many posts that you have difficulty reading text )
It doesn’t support blendshapes. the error is there at the final line of the error
“Modifier cannot be applied to a mesh with shapekeys”. The scene export make sure to apply all modifiers before exporting to avoid issues with the scene not appearing the same as in Blender
Solutions for it ofcourse are comming up but I have other things to do.
I suggest using the actual avatar fst export instead