As part of a task I make, I sometimes use a site I moderate to contact the users, asking them to reply on a specific page on that site (the one I link). The sentence I actually use is the following.
Please reply on https://example.org/link/to/the-issue.
In some cases, I get a message via email, and this not where I want the reply, since I don't usually read the email as often as I visit that site to check any change on the posts where I partecipate. I think they understand my sentence as Please reply to this message about the issue reported on https://example.org/link/to/the-issue.
Is there a way to make clearer I am asking them to post their reply/comment on the page I link?