Error: Requiring Gst, version none: Typelib file for namespace 'Gst' (any version) not found

[sakibstime]

I'm using Ubuntu 18.04 LTS. EasyScreenCast is my favorite screen recording extension. Recently, I newly set up my system. After that when I try to install this extension it seems "error" to enable. When I go to "Gnome Tweak" to enable the extension it shows again error with some details.

Expected Behavior

Work in my PC system

Current Behavior

Error: Requiring Gst, version none: Typelib file for namespace 'Gst' (any version) not found

Stack trace:
@/home//.local/share/gnome-shell/extensions/EasyScreenCast@iacopodeenosee.gmail.com/utilwebcam.js:15:7
@/home/sakib/.local/share/gnome-shell/extensions/EasyScreenCast@iacopodeenosee.gmail.com/prefs.js:31:7
_getExtensionPrefsModule@resource:///org/gnome/shell/extensionPrefs/main.js:75:13
wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
_selectExtension@resource:///org/gnome/shell/extensionPrefs/main.js:90:31
wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
_onCommandLine@resource:///org/gnome/shell/extensionPrefs/main.js:243:17
wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
main@resource:///org/gnome/shell/extensionPrefs/main.js:397:5
@

:1:43

Possible Solution

Looking for it.

Logs

এপ্রিল 04 09:30:19 ws-ubuntu org.gnome.Shell.desktop[19845]: [30685:1:0404/093019.019657:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
এপ্রিল 04 09:30:19 ws-ubuntu org.gnome.Shell.desktop[19845]: [30685:1:0404/093019.020321:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
এপ্রিল 04 09:30:19 ws-ubuntu org.gnome.Shell.desktop[19845]: [30685:1:0404/093019.022126:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
এপ্রিল 04 09:30:19 ws-ubuntu org.gnome.Shell.desktop[19845]: [30685:1:0404/093019.022783:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.

Your Environment

• Where did you download the extension?
  [ https://extensions.gnome.org/extension/690/easyscreencast/ ] Gnome shell extension website

• Gnome shell version: 3.28.4

• Operating System and version: Ubuntu 18.04 LTS

• Display server: Wayland / x11

[somethingGoneWrong]

try to install all gstreamer package, something like:
sudo apt install gst-plugins-base1.0 gst-plugins-good1.0 gst-plugins-ugly1.0 gst-plugins-bad1.0 gstreamer1.0