Hi Stuart,
If you are going to approach this using the Groups plugin, then you would basically create a new group (not a role) and assign the required capabilities to that group. Then you would add the corresponding user(s) to that group. I’m not so familiar with the Event Tickets Plus plugin and would need to install it and have a look at the capabilities it creates to indicate which ones exactly you would have to add to the group. If you’d like to check, with the plugin installed and activated, visit the section Groups > Capabilities from your WordPress Dashboard and click the refresh button (this is to pull in additional capabilities defined by the events plugin in case they haven’t already been added to Groups’ capabilities table).
You can see the capabilities used by their plugin here https://theeventscalendar.com/knowledgebase/admin-roles-and-permissions/ – you can check which ones are needed to grant admin access to the relevant sections and add these capabilities to the new group.
On the Groups > Capabilities admin screen you can also use the filter to look for capabilities that have “event” or “ticket” etc. in there and you should see a set of related capabilities which you can then try out.
I assume that this will help you to create the group with required capabilities and am marking this as solved, but please feel free to ask if you need further help.
