Problem MAC FTB launcher will not load any modpacks when pressing play

[SteckBeast21]

I have recently had a very difficult time with my ftbapp launcher for mac. It stopped working a few days ago and I am not sure exactly what the issue is. when I try to click on the play button of any modpack nothing seems to happen. In an attempt to solve this I removed java and then reinstalled the new version. This gave me no success. Although I was able to go into the contents of my ftbapp and found this error log.

Quite frankly I have no idea what this means. I also deleted the ftbapp and redownloaded it with no evail. I would hate to lose all of the progress and time I have spent on my modpacks and any help or ideas would be greatly appreciated.

 

[DezBossHogg]

How did you find this log? Would love to see if I am having the same issue as you.

 

[woodsmith]

How did you find this log? Would love to see if I am having the same issue as you.

I second this; I can't seem to find any error logs in my instance folders.

 

[LukeIMG]

Also getting an error -

[2021-03-22 22:28:01] [INFO   ] Sending play request to API
[2021-03-22 22:28:01] [INFO   ] Clearing existing Mojang launcher profiles
[2021-03-22 22:28:01] [INFO   ] Injecting profile to Mojang launcher
[2021-03-22 22:28:04] [WARNING] Starting launcher at /Users/luke/Library/Application Support/.ftba/bin
[2021-03-22 22:28:04] [INFO   ] Saving instance json
[2021-03-22 22:28:04] [INFO   ] Starting Mojang launcher
[2021-03-22 22:28:04] [WARNING] /usr/bin/open /Users/luke/Library/Application Support/.ftba/bin/Minecraft.app --args --workDir /Users/luke/Library/Application Support/.ftba/bin
[2021-03-22 22:28:04] [SEVERE ] net.creeperhost.creeperlauncher.minecraft.GameLauncher.launchGame(GameLauncher.java:86): en_GB
[2021-03-22 22:28:04] [INFO   ] Error handling message
java.lang.NullPointerException
    at net.creeperhost.creeperlauncher.minecraft.GameLauncher.launchGame(GameLauncher.java:104)
    at net.creeperhost.creeperlauncher.pack.LocalInstance.lambda$play$12(LocalInstance.java:496)
    at net.creeperhost.creeperlauncher.pack.LocalInstance$$Lambda$285/0000000080EB3C20.run(Unknown Source)
    at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1736)
    at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1728)
    at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
    at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.helpAsyncBlocker(ForkJoinPool.java:1144)
    at java.base/java.util.concurrent.ForkJoinPool.helpAsyncBlocker(ForkJoinPool.java:3151)
    at java.base/java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1817)
    at java.base/java.util.concurrent.CompletableFuture.join(CompletableFuture.java:2043)
    at net.creeperhost.creeperlauncher.pack.LocalInstance.play(LocalInstance.java:502)
    at net.creeperhost.creeperlauncher.api.handlers.instances.LaunchInstanceHandler.handle(LaunchInstanceHandler.java:23)
    at net.creeperhost.creeperlauncher.api.handlers.instances.LaunchInstanceHandler.handle(LaunchInstanceHandler.java:12)
    at net.creeperhost.creeperlauncher.api.handlers.IMessageHandler.handle(IMessageHandler.java:10)
    at net.creeperhost.creeperlauncher.api.WebSocketMessengerHandler.lambda$handleMessage$0(WebSocketMessengerHandler.java:126)
    at net.creeperhost.creeperlauncher.api.WebSocketMessengerHandler$$Lambda$232/0000000080E77E20.run(Unknown Source)
    at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1736)
    at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1728)
    at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
    at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
    at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
    at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
    at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)

 

[Nembulo]

Having the same problem!

 

[Nembulo]

The FTB launcher insists that I am using Java 9, though I am using Java 8.

FTB Launcher logs:

[17:25:28] [ERROR] ErrorUtils.tossError:56: You must use java 8 to play this pack! Minecraft 1.12 and below will not work for java 9
[17:28:37] [ERROR] ErrorUtils.tossError:56: You must use java 8 to play this pack! Minecraft 1.12 and below will not work for java 9
[17:28:41] [ERROR] ErrorUtils.tossError:56: You must use java 8 to play this pack! Minecraft 1.12 and below will not work for java 9
[17:28:54] [ERROR] ErrorUtils.tossError:56: You must use java 8 to play this pack! Minecraft 1.12 and below will not work for java 9
[17:28:59] [ERROR] ErrorUtils.tossError:56: You must use java 8 to play this pack! Minecraft 1.12 and below will not work for java 9
[17:30:34] Logs copied to clipboard

 

[Quetzi]

Having the same problem!

Please do not hijack threads, either create your own thread or open a support ticket at https://www.feed-the-beast.com/support

 

[Quetzi]

Also getting an error -

[2021-03-22 22:28:01] [INFO   ] Sending play request to API
[2021-03-22 22:28:01] [INFO   ] Clearing existing Mojang launcher profiles
[2021-03-22 22:28:01] [INFO   ] Injecting profile to Mojang launcher
[2021-03-22 22:28:04] [WARNING] Starting launcher at /Users/luke/Library/Application Support/.ftba/bin
[2021-03-22 22:28:04] [INFO   ] Saving instance json
[2021-03-22 22:28:04] [INFO   ] Starting Mojang launcher
[2021-03-22 22:28:04] [WARNING] /usr/bin/open /Users/luke/Library/Application Support/.ftba/bin/Minecraft.app --args --workDir /Users/luke/Library/Application Support/.ftba/bin
[2021-03-22 22:28:04] [SEVERE ] net.creeperhost.creeperlauncher.minecraft.GameLauncher.launchGame(GameLauncher.java:86): en_GB
[2021-03-22 22:28:04] [INFO   ] Error handling message
java.lang.NullPointerException
    at net.creeperhost.creeperlauncher.minecraft.GameLauncher.launchGame(GameLauncher.java:104)
    at net.creeperhost.creeperlauncher.pack.LocalInstance.lambda$play$12(LocalInstance.java:496)
    at net.creeperhost.creeperlauncher.pack.LocalInstance$$Lambda$285/0000000080EB3C20.run(Unknown Source)
    at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1736)
    at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1728)
    at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
    at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.helpAsyncBlocker(ForkJoinPool.java:1144)
    at java.base/java.util.concurrent.ForkJoinPool.helpAsyncBlocker(ForkJoinPool.java:3151)
    at java.base/java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1817)
    at java.base/java.util.concurrent.CompletableFuture.join(CompletableFuture.java:2043)
    at net.creeperhost.creeperlauncher.pack.LocalInstance.play(LocalInstance.java:502)
    at net.creeperhost.creeperlauncher.api.handlers.instances.LaunchInstanceHandler.handle(LaunchInstanceHandler.java:23)
    at net.creeperhost.creeperlauncher.api.handlers.instances.LaunchInstanceHandler.handle(LaunchInstanceHandler.java:12)
    at net.creeperhost.creeperlauncher.api.handlers.IMessageHandler.handle(IMessageHandler.java:10)
    at net.creeperhost.creeperlauncher.api.WebSocketMessengerHandler.lambda$handleMessage$0(WebSocketMessengerHandler.java:126)
    at net.creeperhost.creeperlauncher.api.WebSocketMessengerHandler$$Lambda$232/0000000080E77E20.run(Unknown Source)
    at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1736)
    at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1728)
    at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
    at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
    at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
    at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
    at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)

Please do not hijack threads, either create your own thread or open a support ticket at https://www.feed-the-beast.com/support

 

[Quetzi]

I have recently had a very difficult time with my ftbapp launcher for mac. It stopped working a few days ago and I am not sure exactly what the issue is. when I try to click on the play button of any modpack nothing seems to happen. In an attempt to solve this I removed java and then reinstalled the new version. This gave me no success. Although I was able to go into the contents of my ftbapp and found this error log.View attachment 38870
Quite frankly I have no idea what this means. I also deleted the ftbapp and redownloaded it with no evail. I would hate to lose all of the progress and time I have spent on my modpacks and any help or ideas would be greatly appreciated.

Could you follow the instructions here and see if it helps: https://help.ftb.team/help/en-gb/4/5

 

[LukeIMG]

What fixed my issue was copying my version of vanilla minecraft into the bin folder. I did this because I couldn't open the version the launcher downloaded.