Minecraft Forums

Hey. I'm trying to make a modded client, but when I load it up, I get an error.

(It's attached)

What does this mean?

I'm not installing a mod. By modded I meant modified. My bad I'm just messing around with the client.

If you mean the launcher log by this....

[07:39:44] [Client thread/INFO]: Setting user: CharChar14
[07:39:44] [Client thread/INFO]: (Session ID is token:7312dbe0436146b4ac93162c044e1a70:fd7bc63bae6f44e8ba167c4671c73521)
Exception in thread "Client thread" java.lang.ExceptionInInitializerError
at fi.<clinit>(SourceFile:7)
at alq.k(SourceFile:250)
at alq.a(SourceFile:321)
at amj.q(SourceFile:458)
at amj.C(SourceFile:774)
at ty.c(SourceFile:116)
at ty.a(SourceFile:69)
at od.c(SourceFile:481)
at bsu.<init>(SourceFile:293)
at net.minecraft.client.main.Main.main(SourceFile:120)
Caused by: java.lang.SecurityException: SHA-256 digest error for assets/minecraft/lang/en_US.lang
at sun.security.util.ManifestEntryVerifier.verify(ManifestEntryVerifier.java:220)
at java.util.jar.JarVerifier.processEntry(JarVerifier.java:241)
at java.util.jar.JarVerifier.update(JarVerifier.java:228)
at java.util.jar.JarVerifier$VerifierStream.read(JarVerifier.java:483)
at java.io.FilterInputStream.read(FilterInputStream.java:133)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:283)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:325)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:177)
at java.io.InputStreamReader.read(InputStreamReader.java:184)
at java.io.BufferedReader.fill(BufferedReader.java:154)
at java.io.BufferedReader.readLine(BufferedReader.java:317)
at java.io.BufferedReader.readLine(BufferedReader.java:382)
at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1033)
at org.apache.commons.io.IOUtils.readLines(IOUtils.java:987)
at fj.<init>(SourceFile:27)
at fj.<clinit>(SourceFile:19)
... 10 more

That was where it ended.