I am getting "Operation must use an updateable query" error.

Databases > MS Access
When you get the error "Operation must use an updateable query", this means your database is read ONLY.

By default, we give all files read only permission for best security practice.  To give Write permission to your ms access database, please go to your control panel -> Hosting Manager -> File Permission and assign Read & Write permission to your database.

To further secure your database, you should place it into your /db folder.