What could be causing the error message "There was an error saving the user details" when trying to add users back to access groups in Webflow?

The error message "There was an error saving the user details" in Webflow when adding users to access groups typically points to a permissions, data mismatching, or backend sync issue related to User Accounts or Memberships.

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1. Check Site is Published to a Webflow-Hosted Domain  

• The users and access groups feature only works when the site is published on a Webflow.io staging domain or a custom domain hosted by Webflow.
• If the site is not published or has only been published to a static export, access group updates will fail.

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2. Confirm Users Are Still Active  

• Ensure the users you are trying to add are not deleted, deactivated, or pending invite confirmation.
• Go to Users tab in the Webflow Editor or Site settings → Users, and verify their status.

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3. Validate Access Group Structure  

• The Access Group may have been deleted or corrupted or may no longer exist in a compatible form for the user account.
• Double-check the Access Group structure under Memberships → Access Groups and confirm the group is active and properly configured.

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4. Avoid Overlapping or Invalid Rules  

• If an Access Group has conflicting rules, or uses conditional logic based on custom fields that are incomplete or missing for the user, this can cause errors.
• Go to Access Rules and inspect whether group membership depends on data the user profile doesn’t have.

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5. Ensure You Have Correct Permissions  

• You must be logged in with a Workspace Member role that includes permissions for editing Memberships and Users.
• If your role lacks appropriate permissions, you may trigger this error when trying to save.

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6. Clear Cache or Use Incognito  

• Occasionally, Webflow’s interface caches outdated form or access data.
• Try saving the user changes in an incognito window or clear your browser cache to rule out a front-end sync error.

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7. Wait and Try Again (Backend Sync Delay)  

• If Webflow’s backend is experiencing temporary sync issues, some users report that retrying after a few minutes resolves the problem.
• Check Webflow's Status Page for service incidents.

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8. Contact Webflow Support  

• If none of the above resolves the issue, this may indicate a deeper backend fault or a bug.
• Gather specific user IDs or emails and send them with a screenshot to Webflow Support through the dashboard.

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Summary  

To fix the "There was an error saving the user details" issue in Webflow, verify that your site is properly published, the user account is active and complete, Access Groups are valid, and you have appropriate permissions. If all else fails, this may be a backend issue requiring Support intervention.