PDF CREATOR DOESN'T WORK WITH PDF/A : error 29100 ghostscript

I use pdf creator PRO with license. Unfortunately I can no longer print in PDF/A (this is very important to me). Whenever I use PDF/A I get "Ghostscript error 29100". I tried to uninstall and reinstall Ghostscript, to uninstall and reinstall pdf creator: nothing to do in any case. Help me please.