That error "No spectra were found for the new library" can happen if the DDA peptide search found no peptides. I once saw this happen when I used too low of a number for the mass tolerance.
If you actually expected some peptides to be found, then it sounds like Skyline is doing something wrong.
Can you send us your Skyline document, the raw files that you are searching, the FASTA file. It would also be helpful if you could send us screenshots of the pages as you step through the Import Peptide Search wizard so that we will know which settings you used.
In terms of sending the Skyline document, you can use the menu item:
File > Share
to create a .zip file containing your Skyline document and supporting files including extracted chromatograms.
Files which are less than 50MB can be attached to this support request.
You can upload larger files here: