We have an asp.net website using net framework 4.5.2 and are getting the following error only on mobile devices on our startup default.aspx page. Note that we have a site.master page that contains a ScriptManager control. The startup page giving this error has a ScriptManagerProxy control.
The control with ID 'ScriptManagerProxy1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.
If I remove the ScriptManagerProxy control I get the error below.
A ScriptManager is required on the page to use ASP.NET AJAX Script Components.
Note that the mobile device gives the error if I use the default browser or Chrome. If I use a FireFox browser I do not get the error. Also, I do not get the error on a desktop no matter what condition I use.