Expected behaviour

PreviewCard will be displayed.

Actual behaviour

PreviewCard is not displayed.

Steps to reproduce the problem

1. Include https://official.fanbox.cc/ in your post.
2. Check the ID of that post.
3. Open the LinkCrawlWorker job of the corresponding ID from the morgue page of the sidekiq administration ( /sidekiq/morgue).
4. You can see that the error no implicit conversion of String into Integer is displayed.

Specifications

This is a test post.
https://testingmstdn.abcang.net/@abcang/107241694706037663

Main branch after #16938

Mastodon v3.4.1:

I checked the structured data and found that it is an array. Therefore, access to the structured data is failing.