Pulsar Manager keeps saying "This environment is error. Please check it"

OS:
Distributor ID: Ubuntu
Description: Ubuntu 18.04.4 LTS
Release: 18.04
Codename: bionic

Hi,
I have Pulsar instance running in standalone mode.
Also I started Pulsar-Manager with docker. Here is the command line:
`docker run -it -p 9527:9527 -e REDIRECT_HOST=http://127.0.0.1 -e REDIRECT_PORT=9527 -e DRIVER_CLASS_NAME=org.postgresql.Driver -e URL='jdbc:postgresql://127.0.0.1:5432/pulsar_manager' -e USERNAME=pulsar -e PASSWORD=pulsar -e LOG_LEVEL=DEBUG -v $PWD:/data apachepulsar/pulsar-manager:v0.1.0 /bin/sh`

On Add Environment action
i'm getting following error

But there is no any errors in the logs of Pulsar.

Did I miss some configuraion?

Thanks.

Start at Pulsar Manager's Add Environment action and reproduce the error with the supplied Docker command and PostgreSQL settings; compare its response with the Pulsar standalone logs. Done means the environment can be added without the error and the required configuration is clear.

Written by the indexing model from the issue text.