I went to that record and created a citation using WikiTree Sourcer which included this Ancestry Sharing template
{{Ancestry Sharing|7913566|7b22746f6b656e223a2250524f304d4b4c4679733478727058324c5336526d645679562b366e34366f573572612b4e494b2b3755733d222c22746f6b656e5f76657273696f6e223a225632227d}}
I put this in a profile in edit mode and previewed it and the template worked correctly and I could use it to access the sharing image.
So, does the template work for you in that way? When you say you are getting an error about the letter b are you talking about a suggestion?