I created a page and can't edit it. Everything is greyed out so I can't click anything to add text (see image). I'm an admin so I definitely have access to do this. Thanks in advance.
Try going to Confluence Settings -> Space Permissions (in the Security section) and look at the Individual Spaces section. You might have the option to "Recover Permissions" in the Operations column. This worked for me recently when I had your problem.
Cheers,
Mick
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