Web App display blank maps

Is there a requirement on a linux server for rendering maps ?, I have a web app that should display maps, works fine on Windows, and Linux on a test VM I just installed, but it shows the blank Map in a VPS where Is the production application. The VPS is a 16.04.1 64-bit Ubuntu, the app runs in cgi mode on an Apache server. In Linux and WIndows for testing runs in standalone mode.

Thanks in advance for your help

I think there’s a bug with maps and building.
https://forum.xojo.com/37334-webmapviewer-not-displaying-outside-of-debug-build-work-around-
<https://xojo.com/issue/46440>