(node:5132) UnhandledPromiseRejectionWarning: Unhandled promise rejection.

[mmshivukumar]

while adding platform to ionic start theme getting following error

(node:5132) 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(). (rejectio
id: 1)
(node:5132) [DEP0018] DeprecationWarning: Unhandled promise rejections are depr
cated. In the future, promise rejections that are not handled will terminate th
Node.js process with a non-zero exit code.

[firminoweb]

Please, show you node/npm version.