nativescript-cli: Failed to upgrade to TNS 4.0

Did you verify this is a real problem by searching the NativeScript Forum and the other open issues in this repo?

Yes

Tell us about the problem

I just wanted to upgrade my project today to TNS 4.0 but getting following error. Command npm install tns-ios@4.0.1 --silent --save-exact --save failed with exit code 254 ### Which platform(s) does your issue occur on? iOS

Please provide the following version numbers that your issue occurs with:

• CLI: 4.0.0

Please tell us how to recreate the issue in as much detail as possible.

I install and re-install the nativescript. Then trying to create platform but i am unable todo so…