Insufficient Permissions??

[AndreGirard]

I'm trying to add a field into an existing feature and when doing so i get the following error:

We are on ArcSDE with SQL being the server DBMS.

I'm on ArcGIS Desktop 10.5.1

IT department has looked into things on the database & server side and haven't found anything out of the norm.

Any help would be appreciated

Thanks

[GelcysWilliams]

I'm hitting this error now on a db I have permissions to edit - I can't add a new feature class.  How did you guys resolve?  I see a 13 in the error, I'm going to hunt for a SQL Native Client 13 maybe???  Let me know if I'm on the right track??

[MichaelVolz]

Did you just recently perform an ArcGIS upgrade?

Did you apply the patch mentioned above?