If you can, yes. When a question relates to a specific website or page, and the site is publicly viewable, a link makes things faster to solve. This will allow people to see the issue and often leads to faster resolutions.
Keep in mind, links will not get removed any time later, unless in extreme circumstances. Google will capture posts, including any available links within minutes, so if that is a concern to you, please don’t link in the body of your post.