2017 15" MacBook Pro (RP560) [7th,4C,H] + RTX 2070 Super @ 32Gbps-TB3 (Razer Core X) + Win10 [deduwka]
Make sure you follow general eGPU setup guide posted on this site step by step. Try to do it from scratch.
If still no luck welcome to this thread then https://egpu.io/forums/pc-setup/egpu-fail-after-update-to-windows-19-03/
I'm sorry but it's all I can advise. These things are the world of chaos and instability sometimes.