It was giving me the same error page for confirmation and subscription but I created custom pages specifically to redirect. I have no option to do so for unsubscription, regardless it should auto generate as long as I put [Newsletter] (as is) on a page right? Please help.
those strange characters is what the newsletter link [unsubscription_url] generates. All i did was follow your instructions in the config to create a page with only the [newsletter] in content and copy that pages url in the config. everything else seems to be coming from your plugin.
Uhm, so are you sure those character are not part of the message you composed? Can you open the message that contains the unsubscription url and check if there are some other character after the last “}”? Or rewrite the link?