What version of the Spine Runtimes is Pixi using? You need to export from the same version of the Spine editor. Eg, if Pixi supports 3.8, which I think it does, you need to export from Spine 3.8. If you have many projects, you can use the CLI:
Export - Spine User Guide: Command line
For example:
spine-runtimes/export.sh at 3.8
Specifying 3.7.94 should work. Did you make sure to press Save on the settings dialog after setting the version to 3.7.94?
