Please helop me how to resolve this error
Access to XMLHttpRequest at ‘http://192.168.168.26/wfms_timesheet/public/login’ from origin ‘http://localhost:8100’ has been blocked by CORS policy: Response to preflight request doesn’t pass access control check: It does not have HTTP ok status.
Allows to you request any site with ajax from any source. Adds to response ‘Allow-Control-Allow-Origin: *’ header
Add this extension to your browser: Allow-Control-Allow-Origin
i hope it help you 
yes i have tried it is working on browser but when use android device it is not working
Read this topics:
https://blog.ionicframework.com/handling-cors-issues-in-ionic/