iOs build fails

cordova
1

Hey guys,
Since yesterday, Im getting this error while running the command npm run build for iOs. I tried checkouting a new project, removing and reinstalling the platform, modules, etc. Nothing worked.
Could someone give me some enlightenment on how to solve this?

Thanks in advance.

(node:3043) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'toLowerCase' of undefined
    at /Users/username/Documents/petpo-fe-mobile-bugs/platforms/ios/cordova/lib/list-emulator-build-targets:54:45
    at Array.forEach (<anonymous>)
    at /Users/username/Documents/petpo-fe-mobile-bugs/platforms/ios/cordova/lib/list-emulator-build-targets:52:44
    at Array.reduce (<anonymous>)
    at /Users/username/Documents/petpo-fe-mobile-bugs/platforms/ios/cordova/lib/list-emulator-build-targets:50:57
    at Array.reduce (<anonymous>)
    at /Users/username/Documents/petpo-fe-mobile-bugs/platforms/ios/cordova/lib/list-emulator-build-targets:45:28
    at _fulfilled (/Users/username/Documents/petpo-fe-mobile-bugs/platforms/ios/cordova/node_modules/q/q.js:854:54)
    at /Users/username/Documents/petpo-fe-mobile-bugs/platforms/ios/cordova/node_modules/q/q.js:883:30
    at Promise.promise.promiseDispatch (/Users/username/Documents/petpo-fe-mobile-bugs/platforms/ios/cordova/node_modules/q/q.js:816:13)
(node:3043) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:3043) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.