Jira cannot connect to SystemWeaver. 

Error

The server [server code] is not reachable.

Resolution

The Jira installation cannot reach the REST API. Verify that you can connect to the REST API using Postman, for example (for a description, see Installing the SystemWeaver Jira Integration). Verify that the version of the SystemWeaver Jira plugin, e.g., swtabid-1.0.4-SNAPSHOT.jar, you are using is compatible with your version of the SystemWeaver server.