One need to perform below mentioned steps to remove error API from the Modern Bill:
1) Login into the Modern Bill.
2) Click on tools from the menu bar.
3) Click on API Queue.
4) Click on error stats from queue result window which will give the list of error API.
5) Click on delete button to delete Erroneous API.
6) Enter the admin user password.
7) Click on continue to complete the removal process.