Proxy invisible window glitch

when i try to attach a proxy to a video that has a proxy for itself. premiere justs won't let me do anything and it makes a sound every time i click in premiere, like an invisible window. i tried reinstalling premiere, restarted my pc, even reinstalling adobe cloud. but it still won't let me attach proxies. please help. i am using premiere pro cc 2019

My specs:

Processor

Intel(R) Core(TM) i5-7600K CPU @ 3.80GHz

Video Card

NVIDIA GeForce GTX 1050 Ti

RAM

16 GB

Operating System

Microsoft Windows 10 (build 17763), 64-bit