Hi Mikhail,
I checked the errors in browser’s console then I found the error that causes this issue.
It was because I’ve defined a full path of the “myPage.html” file starting with “C:\SCADA\bla\bla\bla\myPage.html” in the interface database of the Scada Administrator, the browser console return an error that “the server can’t access local resources” where the file is located.
I’ve changed the path to the one that mentioned in the example of “Custom Pages”, I paste it as it is “../../custom/MyPage.html” then it worked correctly.
Thanks for your help Mikhail.
Rami