visualeditor-annotationbutton-linknode-tooltip : "<visualeditor-annotationbutton-linknode-tooltip>" visualeditor-annotationbutton-magiclinknode-tooltip-isbn : "<visualeditor-annotationbutton-magiclinknode-tooltip-isbn>" visualeditor-annotationbutton-magiclinknode-tooltip-pmid : "<visualeditor-annotationbutton-magiclinknode-tooltip-pmid>" visualeditor-annotationbutton-magiclinknode-tooltip-rfc : "<visualeditor-annotationbutton-magiclinknode-tooltip-rfc>"
Looks like these were removed but still required by the module.