The source table '%1!s!' specified in the SEMANTICSIMILARITYTABLE, SEMANTICKEYPHRASETABLE or SEMANTICSIMILARITYDETAILSTABLE ...

The source table '%1!s!' specified in the SEMANTICSIMILARITYTABLE, SEMANTICKEYPHRASETABLE or SEMANTICSIMILARITYDETAILSTABLE function doesn't have a full-text index that uses the STATISTICAL_SEMANTICS option.  A full-text index using the STATISTICAL_SEMANTICS option is required to use this function.