.gltf doesn't upload because some gibberish file is missing

Disclaimer: I have barely an idea what I am doing

Hello, I am trying to upload a few 3d models for a school project, but I get a weird error message when trying to upload the gltf-files. It says I am missing a file with some kind of gibberish name? Are there any solutions for this?

Problem solved by using other file format

which format did you use?