In the Application Server web.config file, locate the <DataSource Name="APAcceleratorRelay"> section. Ensure that the API_Type and API_DLL configurations are set.
<DataSource Name="APAcceleratorRelay"
API_Type="Hyland.Integrations.LOBBroker.AccountsPayableOperationSet"
API_DLL="Hyland.Integrations.LOBBroker.AccountsPayable.dll"