Hi @RanaAbdelaal,
What operating system are you running this on? The manifest was clearly made on Windows, but they should be in LINUX / UNIX / Mac OS X path formats which may look like:
/Users/rana/myproject/...
or
/home/rana/myproject/...
If you are using the Windows Sub-System (WSL) for Linux, you may want to move your files inside the WSL env and and then update to the WSL file paths using the information here, see the figure.
If you are on a normal LINUX machine then simply update the file paths from Windows to LINUX format.