Cant launch FTB Unstable 1.21 1.0.1

[dittlau1]

Modpack

FTB Unstable 1.21

Modpack version

1.0.1

Has the pack been modified

No

Log Files

https://pastebin.com/DFvJAXUK
https://pastebin.com/Huqn0Xhr

Describe the bug

Cant start the instance. installed from launcher, instance wont load. Tested a repair through the FTBapp, did not work.

Steps to reproduce

install, launch

Expected behaviour

launch and instance

Screenshots

Additional information

Ran on windows 11 build 23H2

[ftb-helper]

Hay, thanks for the issue! Unfortunately it looks like you've not provided a Debug code... We require this as it helps us find your issue as quickly as possible.

Please do the following

Upload Logs using the app

Open the Settings page in the FTB App, then go to the app tab and click on the Upload Logs button, this might take a few seconds to complete. Once it's done, you will see a message saying that the code has been copied to your clipboard.

Either edit your original issue or add a comment with this code.

Using the FTB Debug tool

Only use this method if asked to or if your app wont open fully/the above method doesn't work, you can use the FTB Debug tool to generate a code for you.

Please use the link below to download and run the FTB Debug tool. This is a tool built by our App Developers and will provide you a code that you need to attach to this issue. Please either edit your original issue or add a comment with this code. If you need more help running this tool, you can follow our guide on how to use the FTB Debug tool.

Windows // MacOS // Linux // Windows (Arm) // MacOS (Arm) // Linux (Arm)

[Gaz492]

Could you try going to settings in the app then click the App tab, now click on the blue "Home" button, this should open a file explorer window to where the app stores data.

Once the window opens, close the app then open the bin folder and delete the runtime folder.

Now start the app again and try starting the pack up. You may need to right click the app, select settings and then click the repair button if it still doesnt start up.

If the above doesnt work for you, would you be able to go to the setting page of the app and click the upload app logs button then reply with the URL it copies to your clipboard?

[github-actions]

This issue has been marked as stale. Please reply to the issue or the issue will be automatically closed in 3 days.

[github-actions]

This issue has been closed as there has been no recent activity after being marked as stale.

[in2erval]

@Gaz492 I was also experiencing similar issues, deleting the runtime folder fixed the issue for me - thank you!