The broken script mod fabric is a common compatibility search, but Minecraft loaders are not interchangeable. If a build was created for Forge or NeoForge, placing it in a Fabric profile does not make it compatible.
Read the release metadata first
Look for the loader name on the actual file or release page. If Fabric is not explicitly listed, assume the build is not a Fabric release.
Why loader mismatches fail
Loaders expose different APIs and dependency systems. A mod compiled for one loader can fail immediately or report missing classes when started under another.
Do not use random “converter” downloads
Avoid third-party packages claiming to convert the mod unless the project itself documents that workflow. Such files add another layer you need to trust.
Best troubleshooting move
Create a clean profile with the loader named by the build. If it works there, your original problem was likely loader choice or another mod conflict.