This happened to me and I found a solution, see if this works for you:
Once you have built your project with the hammer icon:
- select “Run”.
- Run Configurations.
- Choose “C++ Application”.
- Click on the “New Launch Configuration” icon on the top left of the open window.
- Select “Browse” under the C/C++ Application.
- Browse to the folder where you made your project initially.
- Enter the Debug folder.
- Click on the binary file with the same name as the project.
- Select “OK”.
- Click “Apply” to confirm the link you just set.
- Close that window.
Afterwards you should be able to run the project as much as you’d like.
Hopefully this works for you.