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Old 03-16-2025, 05:35 PM   #1
mrfakename
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Posts: 30
Karma: 15056
Join Date: Mar 2023
Device: Kindle Paperwhite 3W
Issue with Kindlet: "This title is not signed by a registered developer"

Hi everyone,

I’m a complete beginner to Kindlet development but I’m trying to make a basic Kindlet for my Kindle 3W. I successfully jailbroke my Kindle and installed MKK, KUAL, and Launchpad. I used Launchpad to copy my developer keystore over.

I was able to successfully run KUAL and KIF (an IF Kindlet). However, when I try running the Kindlet I compiled, I get:

“This title is not signed by a registered developer”

I switched to using KUAL’s keystore (https://bitbucket.org/ixtab/kindlela...loper.keystore), but I’m still getting the same issue, even though I can launch KUAL.

Would anyone be able to provide suggestions on how to resolve this issue? Any assistance would be greatly appreciated.

Edit: I noticed that my error message says "This title is not signed by a registered developer," however when researching similar errors, the message often says "This item is not signed by a registered developer." Not sure if the difference (title vs. item) has any significance.

Last edited by mrfakename; 03-16-2025 at 06:03 PM.
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