# (ToolsNet Web App) Signal R Error

## Scenario A

Cause: Incorrect Active Directory security group configuration.

Solution: In appsettings.json, under AuthenticationSetting set Mode = "None".

## Scenario B

Cause: The user is a member of too many Active Directory security groups.

Solution: Increase the MaxFieldLength and MaxRequestLength values in HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HTTP\Parameters.