Mentioning the custom browser capabilities is throwing error while running it in Azure Devops

So my command line looks like below,

-browserType=“iphonex” -retry=0 -testSuitePath=“Test Suites/Regression” -executionProfile=“UAT”

I have mentioned the browser type as custom, but when I run the tests through Azure Devops, it is throwing error saying it is not found.

Also, the execution profile is also not recognized during the execution. Although I have mentioned the url in the profile, it is throwing error "Unable to open browser with url: ’ ’ ‘’. I guess it is referring to the default profile although I have mentioned the UAT profile in the command line.

Any pointers to solve the above will be much appreciated.