This problem surfaces when the affected user has deny privileges. This error will be seen when the user which you have created does not have the sufficient privileges to access specific database objects (tables, stored procedures, functions) in the database. 

GRANT the user specific permissions such as SELECT, INSERT, UPDATE and DELETE on tables in that database. An example of this SQL command is shown below.

USE [your database name]


GRANT INSERT, UPDATE, SELECT, DELETE ON [dbo].[database object name] TO [sql user name]
-- ex: GRANT INSERT, UPDATE, SELECT, DELETE ON [dbo].[ClientRoles] TO BBPortalWebRole

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