I am getting an error when starting my server saying it requires fabric.

Error code:
[10:12:46] [ForkJoinPool-1-worker-3/WARN]: Non-Fabric mod JAR at "/home/container/mods/Adorn-1.14.1+1.16.5.jar", ignoring
[10:12:46] [main/FATAL]: A critical error occurred
net.fabricmc.loader.discovery.ModResolutionException: Could not find required mod: betterstrongholds requires {fabric @ [>=0.33.0+1.16]}
at net.fabricmc.loader.discovery.ModResolver.findCompatibleSet(ModResolver.java:198) ~[fabric.jar:?]
at net.fabricmc.loader.discovery.ModResolver.resolve(ModResolver.java:832) ~[fabric.jar:?]
at net.fabricmc.loader.FabricLoader.setup(FabricLoader.java:195) ~[fabric.jar:?]
at net.fabricmc.loader.FabricLoader.load(FabricLoader.java:185) [fabric.jar:?]
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:132) [fabric.jar:?]
at net.fabricmc.loader.launch.knot.KnotServer.main(KnotServer.java:28) [fabric.jar:?]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:567) ~[?:?]
at net.fabricmc.loader.launch.server.FabricServerLauncher.launch(FabricServerLauncher.java:68) [fabric.jar:?]
at net.fabricmc.loader.launch.server.FabricServerLauncher.setup(FabricServerLauncher.java:114) [fabric.jar:?]
at net.fabricmc.loader.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:56) [fabric.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.jar:?]
at net.fabricmc.loader.util.sat4j.minisat.constraints.cnf.Clauses.sanityCheck(Clauses.java:97) ~[fabric.jar:?]
at net.fabricmc.loader.util.sat4j.minisat.constraints.MixedDataStructureDanielWL.createClause(MixedDataStructureDanielWL.java:81) ~[fabric.jar:?]
at net.fabricmc.loader.util.sat4j.minisat.core.Solver.addClause(Solver.java:401) ~[fabric.jar:?]
at net.fabricmc.loader.discovery.ModResolver.findCompatibleSet(ModResolver.java:195) ~[fabric.jar:?]
... 12 more

   Idk if this helps, or if I need to give more information on the issue
   
   (It says, "fabric.jar" alot, because I renamed the "fabric-server-launch.jar" to this hoping it would fix the issue.