testing app not running -showing error in device manager - flutter-test

illegal char*> at index0:*.lock
above phrase is appearing on my screen.
I tried running again and again but the above error is appearing again and again.

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React native won't run on device but does on simulator via xcode

When using Xcode, My app is building as expected but it is failing when it starts running with the following error:
Thread 1: EXC_BAD_ACCESS (code=1, address=0x800000002)
The app doesn't crash, it continues running but it just pauses on the launch screen.
However, it works as expected when running on the simulator via xcode. Do you have any idea why it might be failing when running on a physical device?
I have tried cleaning the build folder but it did not do any good.

Cannot debug UWP app on Simulator: foreground can not be acquired

With Visual Studio for Windows, if I debug my Xamarin.Forms UWP app in "Local Machine" it works fine, but if I choose "Simulator", I get the following error when launching the debug session:
Unable to activate Windows Store app '10509MyNameAndSurname.myappname_6k78edmmrpdam!App'. The activation request failed with error 'Activate Application failed as foreground can not be acquired in Windows Simulator'. See help for advice on troubleshooting the issue.
If I click Help, it sends me to this page, which doesn't really mention my problem above. Any way to fix this? The main reason I want to know if it runs this way is because I'm getting a lot of "Cannot launch App" errors from the Windows App Certification Kit.
I restarted the OS and tried with a Blank App (C#, UWP): and got a different error:
Then I retried debugging my app, and got yet a new error:
Error DEP0700: Registration of the app failed. [0x80073CF6] An
internal error occurred with error 0x80073D05. See
http://go.microsoft.com/fwlink/?LinkId=235160 for help diagnosing app
deployment issues.

an error occurred while retrieving the list of virtual devices

Through genymotion add new equipment on the MAC, click add after the mistakes, opens the agent also useless;Here is the log:
Here's an error log.
Here's an error pic.
first thing you do after starting genymotion and before adding a device you should login to your genymotion account. then you can add a device and it should retrieve the list with no problems.

Xcode: Unable to run simulator error

An error was encountered while running (Domain = NSMachErrorDomain, Code = -308)
That is the popup message I get every time. I found another question on here that had a bunch of solutions. I tried a dozen of them without much luck. After seeing the error message it will load the "Home" screen of the simulator but will have trouble running my app.
I made a new blank project and only added a text label to see if the error still happened with a next to blank app and it did.
Any ideas?
Open the iOS Simulator and restore it by clicking on Reset Content and Settings.

meteor + cordova libc++abi.dylib: terminating with uncaught exception

I have been playing around with Meteor's command "meteor run ios-device", and it all worked well.
But after a certain build, the app is freezing at the splash screen and Xcode is showing the following error:
libc++abi.dylib: terminating with uncaught exception
The full console output can be seen here http://pastebin.com/Ta98RkAH
After searching on google/stackoverflow it seems like a lot of people get this error for different reasons, but i can't really tell as i'm not familiar with this error and Xcode at all.
One thing i found on phonegap community was someone saying npm's package "ios-sim" should be updated, but that did not work for me.

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