Installation failed. Failed to verify code signature | SideStore | Page 1

small berry Sep 15, 2025, 9:09 PM

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Updated to iOS 26. Sidestore refresh fails saying VPN is not enabled.
Installing or refreshing other apps fail with the error message mentioned above and in screenshot.
Uninstalled Sidestore and all sideloaded apps, removed the certificate from both iPhone and Windows and tried reinstalling.
Same error happens every time. Tried installing Altstore, same issue.

I'm out of ideas. I had MeloNX deactivated and reactivating it was fine, but nothing else worked after that.

Note: screenshot is from Altserver since I don't have sidestore installed anymore, but I saw this exact error message on sidestore as well.

potent oasis Sep 15, 2025, 9:15 PM

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hate to brake it to you, but everyone has this issue. #quick-support
There is nothing we can do

last vigil Sep 15, 2025, 9:17 PM

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There’s nothing the devs can do?!

potent oasis Sep 15, 2025, 9:18 PM

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last vigil There’s nothing the devs can do?!

Announcement went just out as I wrote this XD
anyways, read it

last vigil Sep 15, 2025, 9:19 PM

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NOOOOOOO STAR PLATINUM!! ZA WARUDOOOOO

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ORA ORA ORA (punches tim cook)

small berry Sep 15, 2025, 9:20 PM

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Haven’t crossed my mind to check #quick-support
I hope it’s just a bug or something. Thanks

#Installation failed. Failed to verify code signature