take a look at this:
Incompatible mod set!
net.fabricmc.loader.impl.FormattedException: Mod resolution encountered an incompatible mod set!
A potential solution has been determined:
- Replace mod 'Scannable' (scannable) 1.7.8+2160e98 with any version that is compatible with:
- fabric-api 0.88.1+1.20.1
Unmet dependency listing:
- Mod 'Scannable' (scannable) 1.7.8+2160e98 requires version 0.87.0+1.20.1 of mod 'Fabric API' (fabric-api), but only the wrong version is present: 0.88.1+1.20.1!
at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:51)
at net.fabricmc.loader.impl.FabricLoaderImpl.load(FabricLoaderImpl.java:192)
at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:148)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)

How To Reproduce:
Have Latest version of Fabric API
Download Scannable mod
Get Error

Hmm, dependency should have been greater or equal, might have tagged a commit too early or so.
Will make a new release with >= 0.88 soon, adjusted in b77b069.