Issue Summary

When the Role-based Access Control (RBAC) feature is enabled on the site, users need to be granted both "Create content" and "Edit content" permissions to create certain content types, specifically regular pages, live docs, and smart links. Users who only have the "Create content" permission and not the "Edit content" permission encounter a UI error message when attempting to create these content types.

Steps to Reproduce

1. Before enabling RBAC, check that your user has been granted the legacy Page>Add permission (individually and via group) in a space.
2. Enable the RBAC feature on your site (Site settings>Configuration>New features).
3. In the space, your user will be shown with only the "Create content" permission ticked under Custom access.
4. Attempt to create a regular page, live doc, or smart link.

Expected Results

The user should be able to create a regular page, live doc, or smart link.

Actual Results

The user receives the following UI error message:

We’re unable to create this content
You don’t have permission to create here or the space has been recently deleted. 

Additional Information:

• Content creation for folders, databases, and whiteboards is not affected and works as expected with only the "Create content" permission.
• This issue restricts user workflow and may require granting broader permissions manually.
• Legacy Page>Add permission should have automatically mapped to split "Create content" + "Edit content" being ticked when RBAC is enabled, since the legacy permission grants users to create and edit any pages in a space (ref: https://support.atlassian.com/confluence-cloud/docs/assign-space-permissions/#What-the-individual-space-permissions-do)

Workaround

Grant users both "Create content" and "Edit content" permissions.