User Replication fails with error message “AnvaigoDynamicLinkLibrary”… “SetSX4000V3” or “Internal Server Error”
Symptom
Anvaigo User replication fails in Anvaigo Client Suite Set-Up with an error message AnvaigoDynamicLinkLibrary.DynamicLinkLibraryClass.SetSX4000V3 failed with this message: The requested failed with HTTP status 404: Not found.
Or a similar message.

Or in Dynamics NAV 2009 Classic Client you get Internal Server Error:

Cause
Anvaigo also tries to replicate Anvaigo Users to Anvaigo Web Portal, but this connection fails.
Solution
If you are not using Anvaigo Web Portal, remove setting Anvaigo Web Store URL in Anvaigo Client Suite Setup:

or
If you are using Anvaigo Web Portal, test if you have entered Anvaigo Web Store URL correctly and IIS and Anvaigo Web Store Application Pool is started.