Postgresql cannot connect to application server via PGAdmin4
After installing through the downloaded postgresql, pgadmin cannot be opened
After uninstalling the original version and installing it, the above problem still persists. I tried separately, 13 and 15, both appeared. Postgresql can run normally, but pgadmin cannot be connected. It is said on the Internet that it needs to be installed separately. I tried it again, and the record is as follows:
