Ionic camera plug in

Hi, please help me. I am new in ionic.
I tried to having ionic camera plug in in my project, but i am having this this error.

(node:1888) 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:1888) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will termina
te the Node.js process with a non-zero exit code.

What does this mean? What have you done?