After applying the redirections through this plugin, almost everything works fine, and the process to create the redirection has always been the same.
But the thing is, not all work. On some links that have the right redirection (the destination URL works, and the original one did work before the redirection) , my server (Nginx) gives a 403 Forbidden.
The weirdest part is, I can't even see anything on my server's error log from Nginx. It's like if no real query was done. I wonder if someone could have some hint to solve this issue.