The following error can occur on clients with more than 500 locations:
Sorry, an error has occurred ! ERROR : please email this info (and if
possible, a brief description of what happened before the error) to
Line 976 in /home/surfmer/sassiecore_a/2templatedirectory/admin/LocationAdmin.php
To resolve the issue:
From the Clients tab select the Survey.
Select Client and Form Settings.
Scroll and select "More than 500" from Client Size (# of Locations).
Select Save Changes.