The following error occurred when I opened Pycharm today:
internal error. please refer to https://jb.gg/ide/critical-startup-errors
The answer is here:
https://youtrack.jetbrains.com/issue/IDEA-238995?_gl=1*37wktk*_ga*MTk3NzA0MTc0OC4xNjY0MjYxODA1*_ga_9J976DJZ68*MTY3MTY4MDkyNS4zLjEuMTY3MTY4MjA4Ni41MS4wLjA.
Here is the scenario given:
Open cmd as an administrator and run it. (win key + s) search for "command", select run as administrator on the right. Also works (press win key + R, type cmd, then press Ctrl + Shift + Enter or click OK to open command prompt as administrator)
Paste and run the following command:
netsh int ipv4 set dynamicport tcp start=49152 num=16383
netsh int ipv4 set dynamicport udp start=49152 num=16383
net stop winnat
net start winnat
Used, now you can open Pycharm.