Hi Yogesh,
Thanks a lot for promptly following this up.
I kind of "fix" or bypassed the problem by examining the 
/var/log/httpd/error_log,
1. The error log suggested something wrong with the libpq package. The RHEL 8 
instance has libpq5, but not libpq. So I installed:sudo yum install -y 
libpqsudo yum install -y libpq-devel  # not 100% sure we need this one
At this point, somehow I feel I need to reinstall the pgadmin4, 'cause pgadmin4 
perhaps would be "aware" of the new libpq, so I removed pgadmin4 and 
reinstalled it:sudo yum remove pgadmin4 sudo yum install pgadmin4-websudo 
/usr/pgadmin4/bin/setup-web.sh
2. Restarted the server, the error log complained something wrong with psycopg 
python library. I have python 3.6 and python 3.11 on the node already, and 
later pgadmin4 brought in python 3.9. I did the followings:
cd /usr/pgadmin4/venv/binsource activate #make sure I am in the python 3.9 
environmentpip install "psycopg[binary,pool]"
deactivate
3. Restarted the server, the error log now suggested lack of privileges to 
access psycopg, I did the followings
cd /usr/pgadmin4/venv/lib/python3.9/site-packageschmod -R 755 *
Finally, restart the httpd, everything seems working now.
Please let me know if this could be the right solution, or any alternative ones.
Many thanks.

Daxu Yin
410-340-5842
 

    On Wednesday, September 6, 2023 at 06:39:22 AM EDT, Yogesh Mahajan 
<yogesh.maha...@enterprisedb.com> wrote:  
 
 Hi Daxu,
Can you please share apache2 logs located at /etc/httpd/logs/error.log?
Thanks,Yogesh MahajanEnterpriseDB


On Wed, Sep 6, 2023 at 2:14 AM Daxu Yin <daxu...@yahoo.com> wrote:

Hi,
We've just installed pgadmin4 version 7.6 following the instructions at 
Download (pgadmin.org)However, we've received "500 Internal Server Error" at 
http://127.0.0.1/pgadmin4
There is zero content at /var/log/pgadmin/pgadmin4.log
Could anyone kindly help us? Many thanks in advance,








Daxu Yin
410-340-5842
 

  

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