Forum Discussion
Security validation for this page is invalid
- Of course, sorry.
I gave the users that experienced this issue admin permission for their department, which they should have already had, on AD.
When the users restarted their devices the problem went away(so far) 🙂
First, clear your browser cache and cookies, then reopen the browser and try accessing SharePoint again.
Ensure you have the necessary permissions to upload files by checking the Library Settings > Permissions. If not, temporarily grant your account admin permissions for your department in Active Directory, then restart your device.
Additionally, add the SharePoint site URL to your browser's Trusted Sites list. Use a different browser to identify if the issue is browser-specific. For SharePoint Designer users, confirm the "Security Validation" feature is enabled. As an admin, you can restart the SharePoint Timer and Administration Services. Also, update your browser and install any required SharePoint add-ons or extensions. If the issue persists after these steps, contact Microsoft Support, as there may be an underlying configuration problem with your SharePoint setup.