Salesforce has identified that the initial fix did not fully deploy to all affected instances. Most services are recovering, but some users may continue to experience access issues or errors while the fix is reapplied.
Users may need to refresh their browser or restart their session to see the fix applied. Per Samir, our Salesforce instance does seems to be working without issue as of this update.
Salesforce continues to work toward full recovery. We will provide additional updates as they become available.