Dear Junmol,
Since Google has changed its policy now required a new Map API key.
Please generate the Map API key here https://developers.google.com/maps/documentation/javascript/get-api-key ,
and put it on assets/js/corporate-plus.js

If there are any issues let us know, our developer will help you to put the API code on the file.

Best Regards!

Dear janwillemvdzee,
If you can provide us with your site URL, we will observe and provide you with possible solutions.
Best Regards!

Dear Junmol,
We have observed your site. The Google map is not loading on another page except the contact us page.
Best Regards!

Dear Markos,
Please add the given code to Additional CSS.
Appearance > Customize > Additional CSS
.menu-default .navbar-collapse {
background: rgba(0,0,0,.95) !important;
}

Please change the rgba value according to your requirements.

Best Regards!

Dear Mgt,
Could you please update the theme to its latest updated version ? Also, deactivate any unnecessary plugins and check if it solves the problem.

Best Regards!

Dear Mgt,
Could you provide us with a screenshot of the issue?

Best Regards!

Dear Junmol,
Please update the Pro theme to its latest version. Let us know if it solves the problem.

Best Regards!

Dear Richard,
Could you please deactivate any unnecessary plugins and check if it solves the problem ?
Best Regards!