The error you experience is because the Telerik.OpenAccess.Runtime assembly is not available after the application is published. This blog post
will provide you with the necessary details and settings for publishing an application with Data Access. I strongly suggest to you to take a look at the Configure the project that will be published
I hope this helps. Do let us know if you need further assistance or information.
OpenAccess ORM is now Telerik Data Access
. For more information on the new names, please, check out the Telerik Product Map