The MEI Garage is a "workshop" for symbolic music encoding data. It is sharing a code base with the TEI's OxGarage and offers a convenient interface to common tasks for music encoding data, both through Web and REST interfaces. It offers conversion between different formats and customization of the MEI Schema.
As @martha-thomae pointed out in https://github.com/music-encoding/music-encoding/issues/702, there is an issue with the MEI Garage that should be addressed. @roewenstrunk, can you take it from here?