MobileRead Forums - View Single Post - Troubleshooting Kindle 4 can't launch KUAL after getting out of KOReader.

Brandacafe · 04-25-2025, 02:21 PM

I have been trying lots of things, I updated the Devkeys to the new ones and now I'm getting this error always:

"An error occured:Main class instantiation threw a RuntimeException. Please contact the developer."

I have tried fresh jailbreaks, checked the threads with the same error but I can't seem to fix it. Some say waiting about 30 seconds after first error should work but no matter how many times I try it just outputs the same error.

I have factory restored and will try anything you guys tell me from scratch.

Thanks for the help!

04-25-2025, 02:21 PM	#12
Brandacafe Junior Member Posts: 3 Karma: 10 Join Date: Apr 2025 Device: Kindle 4	I have been trying lots of things, I updated the Devkeys to the new ones and now I'm getting this error always: "An error occured:Main class instantiation threw a RuntimeException. Please contact the developer." I have tried fresh jailbreaks, checked the threads with the same error but I can't seem to fix it. Some say waiting about 30 seconds after first error should work but no matter how many times I try it just outputs the same error. I have factory restored and will try anything you guys tell me from scratch. Thanks for the help!