the graph included on page https://et.wikipedia.org/wiki/Kasutaja:WikedKentaur/liivakast only renders in page preview mode
but not after page is saved
https://et.wikipedia.org/api/rest_v1/page/graph/png/Kasutaja%3AWikedKentaur%2Fliivakast/0/f0a6cad5d2d95aaede6a0de08b39169437073aa1.png is an HTTP 400 error