Unfortunately, that’s not going to work. You can change the menu capability, but most plugins have a second capability check in the code that displays their admin page. You can’t change *that* without editing plugin source code.
What this means is that “extra capability” functions as an additional filter on top of the required capability, not as a full replacement. If the required capability is “manage_options” and you set “extra capability” to “editor”, the result is that only users who have both the “manage_options” capability *and* the Editor role can see the menu. Typically, there are no users like that, so the menu is completely hidden.
Possible solutions:
– Give the Editor role the “manage_options” capability. This works, but it’s obviously a security risk since it gives them access to lots of other admin settings.
– Use the Pro version to enable the menu for the Editor role. This will also give them the “manage_options” capability, but the menu editor will at least prevent them from opening other admin pages associated with that capability (like Settings -> General). It’s still a security risk, just a slightly smaller one.
– Ask the plugin author to change the required capability.
