https://greatawakening.win/u/q#518 is the link because OP typed the # after the Q instead of before the Q. The reason you get an error message is because u/q#518 is not an actual user name on these forums.
Typing
[u/#q](/u/#q) followed by drop number will embed the drop into the post.
Note - And don't pay attention to the brackets or the repeating of it a second time in parentheses. it's just the way it looks when you type it in code.
OP was trying to embed a Q Drop in his post but typed it incorrectly, so it's directing to a nonexistent user page.
As an example, here's the link to your userpage-
https://greatawakening.win/u/ParklandBob/
If I type u/ParklandBob/ , it has the same effect.
https://greatawakening.win/u/q#518 is the link because OP typed the # after the Q instead of before the Q. The reason you get an error message is because u/q#518 is not an actual user name on these forums.
Typing
Note - And don't pay attention to the brackets or the repeating of it a second time in parentheses. it's just the way it looks when you type it in code.