It works fine with only Fabric 0.13.3 but crashes when I have Ears v1.4.5_01 in the mods folder! The following error pops up:

Uncaught exception in thread "main"
java.util.concurrent.CompletionException: java.lang.IllegalArgumentException: Unsupported class file major version 63
at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315)
at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1770)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 63
at org.objectweb.asm.ClassReader.(ClassReader.java:199)
at org.objectweb.asm.ClassReader.(ClassReader.java:180)
at org.objectweb.asm.ClassReader.(ClassReader.java:166)
at net.fabricmc.tinyremapper.TinyRemapper.analyze(TinyRemapper.java:571)
at net.fabricmc.tinyremapper.TinyRemapper.access$400(TinyRemapper.java:73)
at net.fabricmc.tinyremapper.TinyRemapper$2.visitFile(TinyRemapper.java:525)
at net.fabricmc.tinyremapper.TinyRemapper$2.visitFile(TinyRemapper.java:521)
at java.base/java.nio.file.Files.walkFileTree(Files.java:2811)
at java.base/java.nio.file.Files.walkFileTree(Files.java:2882)
at net.fabricmc.tinyremapper.TinyRemapper.readFile(TinyRemapper.java:521)
at net.fabricmc.tinyremapper.TinyRemapper.access$200(TinyRemapper.java:73)
at net.fabricmc.tinyremapper.TinyRemapper$1$1.get(TinyRemapper.java:492)
at net.fabricmc.tinyremapper.TinyRemapper$1$1.get(TinyRemapper.java:488)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768)
... 3 more

Wait, my mistake! This seems to be a Fabric problem, not an Ears problem. Sorry!