You need to include them in a group that has the "can log in" global permission.
I suspect you've run into the "default settings problem". The default in Confluence (and similarly in JIRA for that matter) is to have a group called confluence-users. This group has "can log in", which is absolutely fine, but then the (bad) design is to use that group generally to allow access to spaces as well, as a default.
This means you have three options
Note that however you do this, you will need to add the user to the "see space" permissions.
Most of us don’t need much convincing that stakeholder management is important. It just makes sense that keeping everyone in-the-know on projects and assigning clearly defined roles is key to having ...
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