Error applying keywords-as-anchors fix

[archaeogeek]

AstunTechnology/iso19139.gemini23@ba6c077 should work but doesn't. Error in editor and in log file:

geonetwork    |  Note: further occurrences of this error will be logged at DEBUG level.
geonetwork    | Error on line 178 of layout-custom-fields-keywords.xsl:
geonetwork    |   XTTE0570: A sequence of more than one item is not allowed as the value of variable
geonetwork    |   $thesaurusConfig (<thesaurus/>, <thesaurus/>) 

(layout-custom-fields-keywords is in iso191939)