Assigning an identifier to a relationship breaks the parser

[hjkiefer]

When assigining an identifier when creating a relationship as described here https://docs.structurizr.com/dsl/identifiers#identifiers, then the parser fails.

Minimal example:

workspace {
    model {
        system1 = softwareSystem "System1" 
        system2 = softwareSystem "System2" 
        rel = system1 -> system2 "test"
    }
    views {
        systemContext system1 "context1" {
            include *
            autolayout lr
        }
    }
}

Error from plugin:

Rendering from structurizr.com

Seems to be related to, or the same as:
#76