launcher fails to recognise applications referred in external media .desktop file

[Pavan]

Ubuntu 20.04 fails to show shortcut icons in the launcher when .desktop file have applications pointing at external drive which is “always connected and mounted”. The screen capture below present you the problem.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
Uname: Linux 5.4.0-28-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Mon May 4 18:20:54 2020
DistUpgraded: 2020-04-29 01:20:49,020 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py (g-exec-error-quark: Failed to execute child process “./xorg_fix_proprietary.py” (No such file or directory) (8))
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: No
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Haswell-ULT Integrated Graphics Controller [103c:2211]
InstallationDate: Installed on 2020-04-28 (5 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: Hewlett-Packard HP 250 G3 Notebook PC
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IN
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-28-generic root=UUID=3c3bd88e-55df-4054-b631-c30ca6ffef19 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-04-28 (5 days ago)
dmi.bios.date: 06/13/2019
dmi.bios.vendor: Insyde
dmi.bios.version: F.47
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 2211
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 86.57
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.47:bd06/13/2019:svnHewlett-Packard:pnHP250G3NotebookPC:pvr0991100000000000000600087:rvnHewlett-Packard:rn2211:rvr86.57:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.family: 103C_5336AN G=N L=CON B=HP S=PAV
dmi.product.name: HP 250 G3 Notebook PC
dmi.product.sku: J7V52PA#ACJ
dmi.product.version: 0991100000000000000600087
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1