Well the dialogue box there comes from your browser informing you of a conflict between your site – which appears to be https and your forum setup that perhaps is not. So the only question is – how was the website built for https and why doesn’t WordPress know that?

i would start by checking the two url’s you have set up in the WP admin > Settings > general and ensure they are both set to https. These WP core settings are what WP uses to inform plugins such as SP of the scheme being used.

What does ‘Can’t edit post either’ actually mean? Describe please.

perhaps mixed http and https content?  did you ever setup wp to be https?  and then update the forum to work with that? seems like forum – integration – page and permalink might not being pointing to https…

Thanks Mr Papa, as I suspected. And apologies, sloppy writing … I meant “can’t edit post using either …” (of the two methods).

Thanks to Yellow Swordfish and Mr Papa, we managed to get the problem fixed – the required step was to update the value of the “sfpermalink” option in the “wp_sfoptions” table to the HTTPS version.

good news!  thanks for the update…