Can't install software like Thunderbird or keepassxc


i installed endeavouros today and since then i can’t install software like thunderbird or keepassxc. Independent from source pacman or yay. There is no error message shown, the installation is complete but there is no icon and name shown in the task menu.

What did i wrong?
Thank you.

Which DE/WM are you using?

What is the output of pacman -Qsq thunderbird

I’m using KDE Plasma 5.23.
Output is just “thunderbird”.

Open a terminal and type kbuildsycoca5 or logout and log back in.


“kbuildsycoca5 is running”

Now check your menu and see if those application are there.

Thank you. You helped me a lot.

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