Hello, I'm Louie, and I'm happy to help you today. Hope you're doing well and safe there. I'm sorry that you're having trouble with the app.
Please try the following methods below to fix this issue. There may be some steps you've already performed but it would be best if you try it again just to make sure.
Method 1: Update Your Phone app
Open Microsoft Store then Click 3 dots
Select Download and Updates
Update Your Phone app or click Get Updates
Method 2: Reset the Your Phone app
Press Start then search and type Apps and Features
Search and select Your Phone App on the list
Click advanced options
Select Reset
Method 3: Reinstall Your Phone via PowerShell.
Press Windows key+X then select PowerShell (Admin)
Copy and paste the command below then press Enter
get-appxpackage *Microsoft.YourPhone* | remove-appxpackage
After that, Please try the methods below to reinstall Your Phone app.
Open Microsoft Store then search Your Phone app
Click Install
Or try this to install Your Phone app via Powershell.
Press Windows key + X
Click and Run Windows PowerShell(Admin)
At the command prompt, copy and paste the following then hit Enter:
Get-AppXPackage *Microsoft.YourPhone* -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Restart your computer
You may also try the solutions provided on the support link below.
https://support.microsoft.com/en-us/topic/troub...
Hope this helps and looking forward for good results.
Kind regards,
Louie