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Error detected: This site already contains a link

Hi,

After having constant issues with child site disconnected but failed to reconect, I try to reinstall MainWP child plugin. I got this error message when trying to reinstall MainWP Child plugin:

Error detected: This site already contains a link. Please deactivate and reactivate the MainWP plugin.
Hint: Go to the child site, deactivate and reactivate the MainWP Child plugin and try again

I have to reinstall since the child site disconnected and never able to reconnect again. Also did deactivate-reactivate mainwp child plugin several times already before gave up.

Before reinstall above, I also try to re-saving the mainwp child plugin setting and got the new unique ID for mainwp dashboard controller.

Does this particular message (Please deactivate and reactivate the MainWP plugin) saying I have to deactivate-reactivate mainwp plugin on dashboard controller, not on child site?
And what does this mean (This site already contains a link)?

Thanks
Tony

Hi Tony, have you tried to deactivate all plugins on the child site (except for the MainWP Child) and see if that helps?

Thanks for reply Bogdan,

No, it’s a live LMS site with 800+ active students. And right now it’s exam time. Not a good time.

I installed MainWP child plugins on some sites and only this site having issues. And it’s only happened recently. No new plugin installed before this issue happen. Just disconnected and I try to re-connect but never succeed.

What does this really mean (This site already contains a link)?