There are 2 ways, in my opinion, to solve this problem. You can either export your family tree to a PDF file, or to export it to a vector format. Usually, these two file formats are highly used in printing shops. By doing this, the files should be opened without any problem. To export your files to a PDF format, you will need to install on your computer a third party tool like Bullzip PDF Printer. After this is installed, open your project and hit Print button. Next, on the printer selection page, choose Bullzip PDF printer. For the second method, from the same printing screen, press the Save in vector format button from the top bar. The staff from the print shop should be able to work with any of the file mentioned.