Editable element in content area not displaying in backoffice locallay and on locomotivecms station

Hi there, I have a problem in my project.

I am using:

ruby 2.7.3
wagon 3.1.1
rails 5.2.4.1

When I serve my project local locomotive backoffice or locomotivecms station, editable elements in content area not showing on any page. I have searched but I have not found the solution.

Kindly share the solution - what should I do?

Thank you,
Basit