I'm attempting to add my local LabKey server to PGAdmin4. The server is running and accessible at:

http://localhost:8080/labkey

I followed the setup detailed here:

https://www.labkey.org/Documentation/wiki-page.view?name=installComponents

However, I am receiving an error:

Unable to connect to server: connection to server at "localhost" (127.0.0.1), port 8080 failed: expected authentication requrest from server, but received H

My PGAdmin settings are as follows:

Host name/address: localhost
Port: 8080
Maintenance database: labkey
Username: labkey (used to setup tomcat - I've also tried the username I initially created when first accessing the labkey server at http://localhost:8080/labkey)
Password: the database password associated with 'labkey'

What am I doing wrong?

Thanks!