There is no attachment, please provide details on the text of the error messages.
also, it would help to know what the steps that lead up to the error messages are.
NOTE: with DW CC, you should also install the Deprecated server behaviors extension:
Also, make sure that the Data Bridge installation has completed, the install steps are:
1) install the Data Bridge extension to the extension manager
?2) open Dreamweaver. If the WebAssist installer does not launch automatically, open a php page, this should prompt the web assist installer to run and finish installing the extension (It will open a window that installs Data Bridge and has steps 1 - 2 - 3 listed)?
3) after the WebAssist installer completes, make sure to close Dreamweaver and start it again.