Web api not showing data in browser as well as mobile testing

Dear All,
I want to use a web api in ionic . but result cannot be shown…
when i use a different api i.e (swapi.co/api/films/) its show a result… but my api cannot show the results. it will generate a error i.e
"
Failed to load strong texthttp://online.efuinsurance.com:9003/Web_Master_App/eMisc/country: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘http://localhost:8100’ is therefore not allowed access.
"![saveee|690x326]`

(upload://lRbvrV2bk34I7HVgGZSzwAeP017.PNG)Preformatted text`
kindly help me plzz