@binsaifullah I encounter the same problem. When your plugin is activated it is not possible to add any widgets or other functions in the Astra Header and Astra Footer builder. When deactivated everything works fine.
It is no direct conflict: I am not trying to use your plugin in the header or footer. When I click on the plus sign in the header or footer builder I don’t get the menu needed to add widgets. I guess there is a conflict in the code you use.
The header and footer builder of Astra work slightly different from other themes, I guess it interferes with that function: https://wpastra.com/docs/create-footer-with-footer-builder/
For me it is a minor issue, if I have to change header and footer I can disable your plug-in first. But you might want to look into it.
greets,
Anne
