Tweet preview is no longer working on my instance

Support
10

I had this problem myself after trying to set this up today, and I happened to find this topic initially after searching and did not immediately see it mentioned in this topic yet; After searching other posts, for me, it had to do what the below linked posts say (use the elevated plan instead of the default essential plan), despite the wording on the Twitter site about reviewing your application, mine was approved instantly, and it worked fine immediately after.