I am not sure whether you posted a full version of your security file, or just part of it, but it is incorrect from XML and XSD point of view (which very likely is what is causing the error).
Here is the valid version, please, try it.
Code:<securityDefinition xmlns="http://www.jaspersoft.com/2007/SL/XMLSchema" version="1.0" itemGroupDefaultAccess="granted"> <resourceAccessGrants> <resourceAccessGrantList id="JoinTree_1_grantList" label="aLabel" resourceId="JoinTree_1"> <resourceAccessGrants> <resourceAccessGrant id="JoinTree_1_grant"> <principalExpression>authentication.getPrincipal().tenantId != null</principalExpression> <filterExpression>TableName.OwnerID in (groovy('authentication.principal.tenantId.toUpperCase()'))</filterExpression> </resourceAccessGrant> </resourceAccessGrants> </resourceAccessGrantList> </resourceAccessGrants></securityDefinition>
