I get an error in Master Detail page - xamarin

So I create a standard xamarin form project with a default template, then I add a Master Detail page template to the project and when I compile this project on the phone I open the side menu and when I click on Page 1 I get the error "System.InvalidCastException: Specified cast is not valid. " I do not change the default template in any way, but I get an error, I believe that it is related to the transition to Page 1 and I do not understand by what principle this transition occurs. Thanks.
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The problem is related to the name of your view is "Page" or already there is a type in xamarin forms with the same name "Page" try making names more clear.
to resolve your problem try forcing the xamarin forms type
(Xamarin.Forms.Page)Activator.CreateInstance(item.TargetType)

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While checking, I saw that every element in the edit form (contained in the custom page) have its CSS position set to Absolute. This seems to be the problem here. The next picture confirms it. I changed the Top value of one of the element and got the following result:
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I did not solve it. It was solved with the last Microsoft CRM update. (The one which hides the Advanced Find - Icon on certain parts of the system). I cannot say what exactly got changed. What I know is that I have not changed anything on my solution at all.

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I am ignorant. For anyone who has the same problem, be sure that your content is not wrapped inside a user control. I did some testing and found that was the problem.

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Calling reports from forms without displaying the form

As the title says, I would like to call the reports from forms without actually displaying the form. I am very new to Oracle forms. I tried to do the following but it didn't work:
1)Inserted the code to call the reports in WHEN-NEW-FORM-INSTANCE trigger.
2)Removed the canvas so that the form won't be displayed.
But I got the error
RM-30173: Module contains no canvases
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Update:
I am using Forms Builder 10.1.2.
As for why I don't want to do this directly in the menu(MMB), the menu doesn't have an option to attach a report and I've already got a working form that generates an report but the code to call the report is written in a button-pressed trigger.
In,
http://forums.oracle.com/forums/thread.jspa?threadID=1107427&tstart=45, I am trying to do what Andreas Weiden, suggested in that thread.

I think your problem may be in limiting your menu options to only opening forms.
For example, you could instead have the menu in your form execute a form trigger which would call the report. Or a web.show_document to the url for the Report.
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I am only familiar with Reports 6i, and it was simple to just run the report from the menu.
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Move the code from the form's button into a procedure in a common library. Attach the library to the form and to the menu module. Call the procedure from both the form button as well as the menu.

I solved the problem by creating a blank canvas in the 'dummy form' as 'FRM-30173: Module contains no canvases' was returned when no canvas was found in the form.
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You could have also just created the report and just call it behind the menu option but hiding the report parameter form and the report would automatically begin to generate. In the menu option just before you call the report name just set the report paramform to hide and destype to screen. This would have save the trouble of creating a blank canvas and maybe having to suppress error messages if any was thrown.

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