In Ubuntu, Joplin Icon does not appear in Workspace

Sadly it is not working properly.

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Linux Installer and Updater

Checking architecture...
The latest version is 1.5.14, but you have 1.4.19 installed.
Downloading Joplin...
/tmp/tmp.N1FnPvgXEP/Joplin.AppIm 100%[========================================================>] 139,29M 4,29MB/s in 31s
/tmp/tmp.N1FnPvgXEP/joplin.png 100%[========================================================>] 22,45K --.-KB/s in 0s
Installing Joplin...
OK
Installing icon...
OK
Create Desktop icon...
grep: /tmp/tmp.N1FnPvgXEP/squashfs-root/joplin.desktop: Datei oder Verzeichnis nicht gefunden
OK
Joplin version 1.5.14 installed.
Cleaning up...
OK

It looks like you're using an old version of the install script. What command are you running?