This issue is due to location of CAST binaries in network location
DLM is an application written in .NET so it is dependent on the external assemblies.
So we should never keep the binaries location in network drive because it creates an issue while loading the dependent assemblies due to security issue.
So the solution to this issue is to
- Keep the CAST binaries in local drive. CAST recommends to keep the CAST binaries in local drive, see Install AIP Core
- If the above steps do not solve your issue report your problem to CAST Technical Support