Liquibase sees my online DB as offline

Liquibase Development
1

Hi
When deploying to AWS I get this error: liquibase.exception.DatabaseException: Cannot execute commands against an offline database. However my DB is not an offline DB. Not sure how to fix this problem.
The DB url I am using looks like: jdbc:mysql://nglx-shared-mysql-cluster.cluster-xxxxxxxxxxxx.us-west-2.rds.amazonaws.com:3306/my-db
Thanks