500 Error on equestria.social

[Sollace]

Embeds are not working for accounts on https://equestria.social. Initially seemed to be only @projectvinyl but testing with my personal account shows the same error.

Embed code:

<iframe allowfullscreen sandbox="allow-top-navigation allow-scripts allow-popups allow-popups-to-escape-sandbox" width="400" height="800" src="https://www.mastofeed.com/apiv2/feed?userurl=https%3A%2F%2Fequestria.social%2Fusers%2Fprojectvinyl&theme=dark&size=100&header=true&replies=false&boosts=false"></iframe>