Ida 8.3 Win 10 Dont opening Assembly windows.

[Kiprus]

Windows 10 Pro
Ida 8.3
Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)]

The plugin is installed, initialized and even works(NOP, JUMP), but the Assembly window just won't open. No errors, just silence.
I've poked around a bit in the code, the execution to PatchingController reaches and it even returns something, but alas no window.