Substance Plugin is unavailable in ue4.15 , and It could not open the project which use the plugin.
It usually takes a few days -> week or two for everything on the marketplace/launcher to get updated when a new version comes out, and it’s currently the weekend so Epic won’t be in the office to process any update submissions. Just give it a little time and it’ll get updated 
@apoisonedgift, Thanks! I’ll look forward to it.
Hi @高登义. Has a update in Allegorithmic website.
https://forum.allegorithmic.com/index.php/topic,15253.0.html