I have a mod that can work when installed only on the server. In previous MC versions, I would use 

acceptableRemoteVersions="*"

in

@Mod

but that is not available in 1.15.2. Is there a way to do this still? Possibly something in mods.toml?

 

Without that, I can still connect to a server that has my mod with a client that doesn't have the mod, but it has a red X and states "Incompatible FML modded server. Server mod list is not compatible":

Edited March 15, 20214 yr by Furgl

Awesome - adding this line to my mod's constructor worked perfectly:

//Make sure the mod being absent on the other network side does not cause the client to display the server as incompatible
ModLoadingContext.get().registerExtensionPoint(ExtensionPoint.DISPLAYTEST, () -> Pair.of(() -> FMLNetworkConstants.IGNORESERVERONLY, (a, b) -> true));

Thank you! Sorry I didn't noticed it in the docs initially.