API link returns 500 for "Lane Ryo Hirabayashi" article

The api page for the article on "Lane Ryo Hirabayashi" returns a 500 error.

document is present in production ES index and appears to be valid
link to the article is present in the articles api list (https://encyclopedia.densho.org/api/0.1/articles/)
another article was published at the same time with no issues ("Ben Wakaye")

Not sure whether it is a defect or data issue. May be related to encyc-core indexing, but not certain.

denshoproject / encyc-front