Problem FTB app not launching

[Henrt1218]

the app shows up in task manager and a background process and not a running app, every time i launch it i get the following error message in the text document. I also cannot launch it through the .jar file because it gives me various errors

Error message:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Aug 10, 2020 4:02:34 PM net.creeperhost.creeperlauncher.CreeperLogger error
SEVERE: Not a valid instance '.localCache', skipping...
java.lang.IllegalArgumentException: Invalid UUID string: infinity 1.7.10
at java.base/java.util.UUID.fromString(UUID.java:215)
at net.creeperhost.creeperlauncher.Instances.loadInstance(Instances.java:69)
at net.creeperhost.creeperlauncher.Instances.refreshInstances(Instances.java:52)
at net.creeperhost.creeperlauncher.CreeperLauncher.main(CreeperLauncher.java:119)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.exe4j.runtime.LauncherEngine.launch(LauncherEngine.java:84)
at com.exe4j.runtime.WinLauncher.main(WinLauncher.java:94)
at com.install4j.runtime.launcher.WinLauncher.main(WinLauncher.java:25)
Uncaught error fetching image:
java.lang.NullPointerException
at java.desktop/sun.awt.image.URLImageSource.getConnection(URLImageSource.java:101)
at java.desktop/sun.awt.image.URLImageSource.getDecoder(URLImageSource.java:111)
at java.desktop/sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:263)
at java.desktop/sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:212)
at java.desktop/sun.awt.image.ImageFetcher.run(ImageFetcher.java:176)

 

[grandrolf]

Looks like something might be blocking - do you have any 3rd party antivirus software installed on your machine?

 

[Henrt1218]

the only thing i have right now is the default windows firewall, installing norton later

 

[grandrolf]

Try re-installing the app and the packs. (take backups of the saved worlds first if you have any)

 

[Henrt1218]

Try re-installing the app and the packs. (take backups of the saved worlds first if you have any)

unfortunately ive done that multiple times with no different result... i dont really know what else to do lol

 

[grandrolf]

Do a uninstall and also delete these folders manually:

press windows key +r and type %appdata% and then OK

Remove these 2 folders:
FTBA
ftb-app

Also check if there's a folder called .ftba under
c:\users\YOURUSERNAME
and delete that folder as well.

Then re-install.

And remember the backups first.

 

[Henrt1218]

Do a uninstall and also delete these folders manually:

press windows key +r and type %appdata% and then OK

Remove these 2 folders:
FTBA
ftb-app

Also check if there's a folder called .ftba under
c:\users\YOURUSERNAME
and delete that folder as well.

Then re-install.

And remember the backups first.

YAAAAAAAAAAYYYYYYYYY that worked!!!! thank you so much for your help!! it was the .ftba folder in the users slot that was the issue!!!! youre a life saver!