[Bug] Error: : XamlC error XFC0000 : Cannot resolve type "MediaElement" when i add x:Name to MediaElement in xaml file

[stoff99]

Description

When i add x:Name to MediaElement i get XamlC error XFC0000 : Cannot resolve type "MediaElement" but its compiling.
Also when i use the variable definition in the code its marked as red but its compiling and i can call methods of it.

Steps to Reproduce

1. Create a new Flyout Xamarin Forms app.
2. Add the MediaElement in the AboutPage.xaml:
   <xct:MediaElement Source="https://sec.ch9.ms/ch9/5d93/a1eab4bf-3288-4faf-81c4-294402a85d93/XamarinShow_mid.mp4 " ShowsPlaybackControls="True"/>
3. Press "Save" (CMD+S) and everythings is ok, you see no error
4. Add x:Name="VideoElement" and press "Save" (CMD+S), now you see the error "Errors in file generation."
   <xct:MediaElement Source="https://sec.ch9.ms/ch9/5d93/a1eab4bf-3288-4faf-81c4-294402a85d93/XamarinShow_mid.mp4 " ShowsPlaybackControls="True" x:Name="VideoElement" />
5. Open the errors window and you can see the error: XamlC error XFC0000 : Cannot resolve type "MediaElement"
6. When you now compile, its working.
7. Open now the AboutPage.xaml.cs and try to get the VideoElement.
8. VideoElement is marked red.
9. Type VideoElement.Play(); and run the app.
10. Everything is working fine without any crash but the error still exists in the error window.

Basic Information

• Version with issue:
• Last known good version: 1.1.0 and also the 1.2.0-pre2
• IDE: VS Mac Community V8.10.1 (build 71)

Workaround

Its working but the error is still present in error window

Reproduction imagery

[iamomkar]

Facing same issue with popup

Error : XamlC error XFC0000 : Cannot resolve type "Popup"

[jfversluis]

Closing this and leaving #1311 open. This all seems to be the same issue and is more a bug in the tooling than something we can do :(