Hi @Roger Roger ,
After you created the page, are you unable to enter the Page library or unable to find the Private Draft Page you created in the Page library?
I tested it and your situation did not occur.
I suggest you do the following troubleshooting:
- Ask the site owner to check and see if it can be seen.
- You said that there is no problem with the other site. Are there any differences between the two sites?
- Create a new site and try to see what the result is.
For your reference:
https://sharepointmaven.com/private-draft-of-sharepoint-page-how-it-works/
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