You did nothing wrong; I tried to visit the link you posted initially (which is on the sopuli.xyz instance; I am on the meow.social instance) and was instructed that I needed to log in to that instance to access the thread wherein the article was hotlinked out of.
For whatever reason the second time I did so I was able to enter the thread you linked to and could visit the Trekmovie site it linked out to. I don't believe there was remotely any malfeasance on your part, only that on my initial attempt to use the link I couldn't access it.
@Klanky I believe you, and I think my initial and firmer tone was perhaps uncalled for; I apologize for that.
I should mention that you are also posting from the 'sopuli.xyz' instance; I am not familiar with the bulk of cross-instance posting mechanics but it may simply be an unusual, if unfortunate abstraction of behaviour in how posting works and links behave on the original post's instance and Fediverse instances other than that.