Server with Fabric modpack or mods is not starting up, showing a error code of a mod that doesn't exist
This article explains how to fix the issue where fabric server is not starting up or showing up with an error.
Downgrade Fabric Loader by downloading the second-latest server files from the Fabric site (0.14.22 instead of 0.14.23), upload it to server Files. Remove the old server.jar file, and rename the uploaded file to server.jar.