[09:04:21] [main/ERROR]: Incompatible mods found!
net.fabricmc.loader.impl.FormattedException: Some of your mods are incompatible with the game or each other!
A potential solution has been determined, this may resolve your problem:
         - Install coroutil, version 1.21.4-1.3.8 or later.
More details:
         - Mod 'What Are They Up To' (watut) 1.21.4-1.2.5 requires version 1.21.4-1.3.8 or later of coroutil, which is missing!
        at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:51) ~[fabric-loader-0.16.10.jar:?]
        at net.fabricmc.loader.impl.FabricLoaderImpl.load(FabricLoaderImpl.java:196) ~[fabric-loader-0.16.10.jar:?]
        at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:146) ~[fabric-loader-0.16.10.jar:?]
        at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68) [fabric-loader-0.16.10.jar:?]
        at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23) [fabric-loader-0.16.10.jar:?]
        at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:69) [fabric-loader-0.16.10.jar:?]
        at net.fabricmc.installer.ServerLauncher.main(ServerLauncher.java:69) [fabricserver.jar:1.0.1]