How can I fix this error, i was working on a project and after saving turned the pc off after a while and turning on the pc i lunched the app and this showed up
Thanks for the information - that eliminates some possible causes of the error.
Look in the folder that contains the MVP file for the project causing the problem and if there are any files with _BAK in their name move them to a temporary folder and start MEP 2016.
If that does not work then try resetting the program to its default settings - File, Settings, Reset program settings . . . . close the program and then select Start menu, Power, Restart to reboot the computer
Note - resetting will lose any custom settings eg folder paths you have created.