TestExecute - Mensagem: File because it is not a valid project suite or project file

Good morning

We have TestComplete license in version 12.50.4142.7 and TestExecute in version 11.31.2420.11.

When opening the project, the message appears: "Cannot open the 'C:\git\TestComplete\checklist\checklist.mds' file because it is not a valid project suite or project file."

Can you help me open the project in TestExecute? 

What is the possible solution?

Thank you very much

Alex