Good morning, I have a PCB designed for Nextion display mounting and I'm having some difficulty with getting JLCPCB to recognize what I'm trying to do. The display PCB has no traces, only a cutout and a few holes.  It does have the JLC serial # positioning on the bottom silk screen layer. I want just want blue solder mask front and back (and the back silk screen).  However, nothing I've tried gets JLC to display the Gerber with solder mask.  I tried copper fill, but that didn't help. I've read [https://easyeda.com/forum/topic/Gerber-Generator-not-creating-bottom-solder-mask-properly-a0b2833339464b73851aa60237c8e157](https://easyeda.com/forum/topic/Gerber-Generator-not-creating-bottom-solder-mask-properly-a0b2833339464b73851aa60237c8e157), but between the "do this - don't do this," I haven't made much headway getting JLC to properly display the Gerber I've uploaded. Any suggestions on how to get EasyEDA/JLC to do this would be much appreciated. This is the panel -  I know, I love it too. Thanks. Jim