Error: AVD cannot be created in Qt Creator - qt-creator

I'm trying to create an AVD for my QT Creator, I keep getting this error and now I don't know what to do.
Is there anything I can do to fix this?

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Unable to upload Xamarin.ios solution to TestFlight cause of following error:

We have an update scheduled for our iOS app which needs to be uploaded to TestFlight first. Hovever, just out of nowhere, the following error keeps preventing Visual Studio from uploading the solution to TestFlight:
This is a screenshot of the error
I am relatively new to this and have no clue where to look in VS. And I've already been searching everywhere online..
Some extra info:
Visual Studio for Mac (latest version)
macOS Big Sur (11.2.3 - latest)
I do believe this might have something to do with the implementation of Firebase into my app. But being a relative newbie, I'm also not entirely sure where to look..
I'd love to hear from anyone with a solution!!
I found the answer!
For some reason all I had to do was get rid of the old xCode version I had and download the latest from apple's website rather than the app store...

Getting Unknown Build error in Visual Studio for Mac

While trying to build a Xamarin.ios project, it gives me Unknown Build Error, for iPhone Device.
While Building for Simulator it builds fine.
The Error i get is somrthing like below.
Error: /Users/admin/Documents/projectdirectory/AppName.app: unknown error -1=ffffffffffffffff
I am using latest Xamarin and Xcode, and MVVM crosslight.
Please help in resolving.
The issue was with certificate. The app was not able to build properly as it wasn't able to find the certificate.
the issue got resolved by just restarting the machine.

xamarin for mac couldnot create or open xamarin.form project

MarshalError: [NOTE: this exception originated in the server.]
Couldn't get signature for selector 'supportedRuntimes'
I had the same error, and it seems it was because some Mac updates (I had just updated the SO and XCode), I updated Xamarin (Xamarin Studio > Check for Updates...) and it worked just fine.

Xamarin: Unable to open the project with Method not found: System.__CanonEnumerator.NameAndPassword

I am trying to open a project pulled from the SourceTree and opened up with Xamarin. It was a Xamarin.Form project. Somehow I received this error:
Does anybody come across this problem.
Install latest xamarin fixed my own problem

Cocos2dx error compile using XCode

I just download new Cocos2d-x version 2.1.5. And try the new feature by generate project for all platform by calling "create_project.py".
All project platform created successfully, and try Android and windows platform and it works properly.
But i have an error when running on my XCode. Here the error i got
Please let me know if anyone know how to fix it.
Thanks a lot.

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