ASAbinaya Subbiah Syncfusion Team January 13, 2017 08:17 AM UTC
Thanks for contacting Syncfusion support.
We suspect that the issue “npm ERR! firstname.lastname@example.org postinstall: `typings install`” occurred due to typings not installed properly in system environment. So we recommend you to install typings package globally using the below command.
npm install -g typings or
npm install typings -g