Thank you, I probably copied the password incorrectly, and that is why it didn’t work. I am sorry about that.
So I noticed that the keyword “gaia” is within the “Resource author curator” field. That field is however a post object storage field. That means, it does not actually store these keywords as text, but serialized relationship objects. Unfortunately relationship, and object storage and similar serialized object fields are not searchable, as the information is not directly stored in the field data.
I believe the quickest way of resolving this is by perhaps using the additional search keywords field, which lets you enter additional search keywords for each custom post type.