O.k. this is the error message from the another thread https://ask.embedded-wizard.de/1142/error-can-not-create-file. I suppose, you have opened one of the provided project templates for editing your own project. Is this the case? As described in the thread, this is not the optimal approach :o)
According to the message, you was not able to save the project. This is because the project templates are stored in the protected area of file system. Is your project still opened in an Embedded Wizard Studio instance? If yes, you can copy your project members between two Embedded Wizard Studio instances. For this purpose:
1. Switch in the Navigation Bar to the Composer page with the unit Application.
2. Press Ctrl+A to select all members within the unit.
3. Copy the members in the Clipboard by using the keys Ctrl+C.
4. Open a new instance of Embedded Wizard Studio.
5. Create now a new empty project.
6. In the just created project open the Composer for the unit Application.
7. Press Ctrl+A to select all members within the unit Application of the just created new project.
8. Press Del to delete the selected members.
9. Then press Ctrl+V to paste the previously (step 3) copied members from the another (original) project.
With these steps you have tranferred the unit contents from one project to another project.
Does it help you further?
Anyway, I would like to understand how you have gotten into this situation. The project templates files are usually not exposed. So accessing them is not evidently. Have you navigated with File Explorer to the folder and opened the files?
Best regards
Paul Banach