No usable authlib availible!

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E

EmeraldGreenKitten

Guest
Title No usable authlib availible!

Launcher Type FTB Launcher

Modpack

Modpack version

Have you modified the pack?

Link to log file

Details of the issue On my MacBook air (HighSierra). When FTB launches, it come up with the following message:
No usable authlib availible. Please check your firewall rules and network connection. can't start minecraft without working authlib. launch button will be disabled. Then when i click on SkyFactory3 (Or any other modpack) it says "You must use Java 8 to use this pack! Minecraft 1.12.2 and below will not work for java 9. I used java 11 at first, but then switched to java 8. Even when i use the twitch launcher it doesn't work because it has the error message: Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option PermSize; support was removed in 8.0
Exception in thread "main" java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')
at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
(I don't understand that and i prefer to use the legacy launcher if possible)

So please help. i am on youtube and i promised to make SkyFactory videos in a few days!!
 
Last edited by a moderator:
E

EmeraldGreenKitten

Guest
Technically only 20 people were expecting it, but that's 20 people that are dissapointed! :(
 
J

jikuja

legacy FTB Launcher developer
Launcher Developer
Global Moderator
Dec 17, 2013
1,134
111
99
It is still using something else than java 8,
 
F

firarottico

Guest
EmeraldGreenKitten said:
Title No usable authlib availible!

Launcher Type FTB Launcher

Modpack

Modpack version

Have you modified the pack?

Link to log file

Details of the issue On my MacBook air (HighSierra). When FTB launches, it come up with the following message:
No usable authlib availible. Please check your firewall rules and network connection. can't start minecraft without working authlib. launch button will be disabled. Then when i click on SkyFactory3 (Or any other modpack) it says "You must use Java 8 to use this pack! Minecraft 1.12.2 and below will not work for java 9. I used java 11 at first, but then switched to java 8. Even when i use the twitch launcher it doesn't work because it has the error message: Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option PermSize; support was removed in 8.0
Exception in thread "main" java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')
at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
(I don't understand that and i prefer to use the legacy launcher if possible)

So please help. i am on youtube and i promised to make SkyFactory videos in a few days!!
Click to expand...
In fact just 20 individuals were expecting it, however that is 20 individuals that are dissapointed!
 
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