What does error message "An error occurred while trying to create the resulting file. The conversation was not completed! Check the path validity of the resulting file." mean and how can I solve and fix it.
Change File Name
When trying to export, click on "Change name..." and modify it to something else then click on on "Save".
Change Export Resolution
When trying to export, click on "Edit profile..." and change Resolution in Video Settings from 0 and 0 to something else.