Portal Web Site Control Manager detected PORTALWEB is not able to save the Web.config. Possible causes: Web.config is unavailable, ...

%11Portal Web Site Control Manager detected PORTALWEB is not able to save the Web.config. 

Possible causes: Web.config is unavailable, deleted, or security properties have been set to prevent editing. 
Solution: Verify Web.config is present and that the account used for the SMS_EXECUTIVE service has rights to edit the web.config. If the web.config file is not present, you can reinstall the system role.
%0