On Soul Fire 1.16.5-1, Tinytweaks 1.2.1, Minecraft 1.16.5
Trying to launch the game with both installed causes an error.

[15:31:50] [main/FATAL]: A critical error occurred net.fabricmc.loader.discovery.ModResolutionException: Found conflicting mods: tinytweaks conflicts with {onsoulfire @ [*]} at net.fabricmc.loader.discovery.ModResolver.findCompatibleSet(ModResolver.java:201) ~[fabric-loader-0.11.2.jar:?] at net.fabricmc.loader.discovery.ModResolver.resolve(ModResolver.java:787) ~[fabric-loader-0.11.2.jar:?] at net.fabricmc.loader.FabricLoader.setup(FabricLoader.java:211) ~[fabric-loader-0.11.2.jar:?] at net.fabricmc.loader.FabricLoader.load(FabricLoader.java:201) [fabric-loader-0.11.2.jar:?] at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:126) [fabric-loader-0.11.2.jar:?] at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28) [fabric-loader-0.11.2.jar:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_281] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_281] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_281] at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_281] at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196) [NewLaunch.jar:?] at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231) [NewLaunch.jar:?] at org.multimc.EntryPoint.listen(EntryPoint.java:143) [NewLaunch.jar:?] at org.multimc.EntryPoint.main(EntryPoint.java:34) [NewLaunch.jar:?] Caused by: net.fabricmc.loader.util.sat4j.specs.ContradictionException: Creating Empty clause ? at net.fabricmc.loader.util.sat4j.minisat.constraints.cnf.Clauses.propagationCheck(Clauses.java:117) ~[fabric-loader-sat4j-2.3.5.4.jar:?] at net.fabricmc.loader.util.sat4j.minisat.constraints.cnf.Clauses.sanityCheck(Clauses.java:97) ~[fabric-loader-sat4j-2.3.5.4.jar:?] at net.fabricmc.loader.util.sat4j.minisat.constraints.MixedDataStructureDanielWL.createClause(MixedDataStructureDanielWL.java:81) ~[fabric-loader-sat4j-2.3.5.4.jar:?] at net.fabricmc.loader.util.sat4j.minisat.core.Solver.addClause(Solver.java:401) ~[fabric-loader-sat4j-2.3.5.4.jar:?] at net.fabricmc.loader.discovery.ModResolver.findCompatibleSet(ModResolver.java:198) ~[fabric-loader-0.11.2.jar:?] ... 13 more

Oops, disregard, I forgot that TinyTweaks actually includes the same tweaks On Soul Fire does!