Can't join Lan

[JadMad]

When I set the "Pay to Unlock" setting to true and I hosted a Lan world my sibling couldn't join when I had the mod installed on his client, too.

[Funwayguy]

Do you have the console logs from the client/host? It's not very easy to fix something without the error log. You don't need to provide the whole file, just the part with the error when the connection was attemped.