apache virtualhost

on centos8 and apache2.4 I installed postgres13 and pgadmin4 and a php
application

I configured single virtualhost as follow:

<VirtualHost *:80>
DocumentRoot /var/www/myapp1/public

<Directory /var/www/myapp1>
AllowOverride All
</Directory>

LoadModule wsgi_module modules/mod_wsgi.so
WSGIDaemonProcess pgadmin processes=1 threads=25
WSGIScriptAlias /pgadmin4
/usr/lib/python3.6/site-packages/pgadmin4-web/pgAdmin4.wsgi

<Location /pgadmin4>
WSGIProcessGroup pgadmin
WSGIApplicationGroup %{GLOBAL}
Require all granted
</Location>
</VirtualHost>

myapp1 works well on http://MY_PUBLIC_IP/
but when I try to get pgadmin web interface at http://MY_PUBLIC_IP/pgadmin4
I got internal server error.

how to configure apache virtual host to get:

pgadmin4 at http://MY_PUBLIC_IP/pgadmin4 and myapp1 on http://MY_PUBLIC_IP

or pgadmin4 at http://MY_PUBLIC_IP:50050/ and myapp1 at
http://MY_PUBLIC_IP/