1. How have you installed pgAdmin 4 on your system?
2. Do you have any other version of pgAdmin 4 on your system ?
3. Please enable the logging (Ref: https://www.pgadmin.org/faq/#8) and check for the errors. You can check the logs through pgAdmin 4 tray icon > View logs menu option.
Good afternoon. My name is Eugene from Kiev (Ukraine). I will communicate with you with the help of Google-translator (I just do not know English).
The question is this: I have PostgreSQL 10.5 and PgAdmin 4-3.2 on my computer (windows Server 2012 R2 system) and PgAdmin 4 does not start and gives an error. I've already reviewed all the solutions to the problem on the Internet, but I can not do anything.