Error occur when running application?

Please help me any one why it’s occur , code every thing okay…
output is came at fist time…when i am continue running ionic2 application getting run error please show below error…

after continue run application occur another error
i.e below

First error sounds like a CORS issue with a URL you are requestion.
Please look at the console and network tabs in your browser’s dev tools if there are any errors.