Form submission error

Hello
We have installed an ODK Aggregate server. You can load a form on the server and download a form on a tablet. But when you submit a form to the server, you receive an error message. When I look in the tomcat log, here is the message that appears in the logs:
"" May 02, 2017 11:48:20 PM org.opendatakit.common.security.spring.RoleHierarchyImpl refreshReachableGrantedAuthorities
INFO: Executing: refreshReachableGrantedAuthorities
May 02, 2017 11:48:20 PM org.opendatakit.common.security.spring.UserServiceImpl reloadPermissions
INFO: Executing: reloadPermissions
""
Someone could help me