Chris,

Could it be one of my skins causing this problem? it seems to be to redirecting to but dnn is unable to find the correct page? 

I force my site to the default skins by changing the folder name where my skins are and now the site just hangs on the login the goes to the same error page as above and the log says this

2016-03-03 14:10:03,484 [LVXML-Server1][Thread:12][FATAL] DotNetNuke.Services.Exceptions.Exceptions - System.Web.HttpException (0x80004005): The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
   at System.Web.UI.ControlCollection.Add(Control child)
   at DotNetNuke.Services.Exceptions.Exceptions.ProcessModuleLoadException(String FriendlyMessage, Control ctrl, Exception exc, Boolean DisplayErrorMessage)
2016-03-03 14:10:03,485 [LVXML-Server1][Thread:12][ERROR] DotNetNuke.Services.Exceptions.Exceptions - ~/Default.aspx?tabid=56&def=ErrorMessage
System.Web.HttpException (0x80004005): The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
   at System.Web.UI.ControlCollection.Add(Control child)
   at DotNetNuke.Services.Exceptions.Exceptions.ProcessModuleLoadException(String FriendlyMessage, Control ctrl, Exception exc, Boolean DisplayErrorMessage)