Application Not Functional under Ubuntu 24.04 LTS

[novaTopFlex]

Following a complete upgrade of all software packages to their Ubuntu 24.04 LTS versions (from Ubuntu 22.04 LTS), the Zeal application had seemed to stop functioning completely. I have attempted to utilize the relevant apt-get commands to ensure that I could upgrade all packages that had been reported as "held back" but continue to receive errors with all upgrades manually completed. For more context on what has been affected by the software update, please consult the output below (even running zeal -f to "force" the application would not succeed):

zeal.core.applicationsingleton: Singleton ID: RGHLSsTgHX9H9J-2laKLNTQOjFjHpHBbPzs_lVd5cmE
zeal.core.applicationsingleton: Starting as a primary instance. (PID: 31186)
qt.webenginecontext: 

GL Type: desktop
Surface Type: OpenGL
Surface Profile: CompatibilityProfile
Surface Version: 4.6
QSG RHI Backend: OpenGL
Using Supported QSG Backend: yes
Using Software Dynamic GL: no
Using Multithreaded OpenGL: yes

Init Parameters:
  *  application-name Zeal 
  *  browser-subprocess-path /usr/lib/qt6/libexec/QtWebEngineProcess 
  *  create-default-gl-context  
  *  disable-features ConsolidatedMovementXY,InstalledApp,BackgroundFetch,WebOTP,WebPayments,WebUSB,PictureInPicture 
  *  disable-setuid-sandbox  
  *  disable-speech-api  
  *  enable-features NetworkServiceInProcess,TracingServiceInProcess 
  *  enable-threaded-compositing  
  *  in-process-gpu  
  *  use-gl desktop 

[31186:31186:1122/225257.439673:FATAL:credentials.cc(126)] Check failed: . : Permission denied (13)
Trace/breakpoint trap (core dumped)

[novaTopFlex]

When I had entered into gdb, I had not been particularly successful in locating the specific issue that must be resolved for my apt installation of Zeal to function from the official repositories based on the following uname -a result:

Linux ubuntu-macbookpro 6.5.0-45-generic #45~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Jul 15 16:40:02 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

[novaTopFlex]

I have repeated any attempts to perform the commands, sudo apt update and sudo apt upgrade, as well as sudo apt remove --purge zeal and sudo apt install zeal. However, none of the recommended commands from apt-get and similar utilities have succeeded in my ability to recover my Zeal documentation browser. I have installed the Flatpak version, except with limited success; the documentation seems to return to the incorrect directory.

[trollixx]

Without actual stack trace it's nearly impossible to say what actually is broken. The crash doesn't even happen in Zeal's code. Quick googling suggests the issue is with AppArmor and there are various attempts at fixing it.

You should be able to point Flatpak version to the any directory in the settings.