"Unhandled promise rejection (rejection id: 1): [object Object]" from "ionic cordova run android"

(node:7870) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): [object Object]
(node:7870) [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.

This error just comes from ionic cordova run android and no such error if I run ionic serve

Please did a solution for this?

There was thrown an error inside a promise somewhere, that was not catched. Thats what it says but there is no clue about where the error happened or what the error is. Was that all that was printed to your console?