Developer instance showing error in Virtual Agent ServiceNow

Hello everyone,

    In my personal developer instance washingtonDC version, after installing the plugins related to virtual agent I encounter this error  "Some features may not be available because the connection to NLU Service is not available. Please try again after sometime, if the issue persists log an issue with Support" and I'm not able to create a NLU model/intent/utterenace.

Can someone tell on how to resolve the issue.

Regards,

Shalani R