Description:
When the integration manager for QuickBooks online edition is launched, and the session ticket is pasted it throws up the below given error message.

Index was out of bounds of array.

Cause:
Currently, the integration manager for QuickBooks supports only the US Version of QuickBooks online edition. This error message pops up if you are integrating Web TimeSheet with any other version of QuickBooks online, Example Canadian or Singaporean versions.