Apache - Hosting two Django projects issue - One project is very slow / unaccessible

Question

I'm hosting two Django projects on my Ubuntu 20.04 server using Apache, with two different domains.

djangoproject1 is hosted on example1.com:8000

djangoproject2 is hosted on example2.com:8000

However I'm having a strange issue where only one of the two is accessible at a time. Both sites work perfectly when the other one is disabled (using "a2dissite"). But when both are enabled, only one will work and the other one loads forever until time out.

djangoproject1.conf

<VirtualHost *:8000>
        ServerAdmin webmaster@localhost
        ServerName example1.com
        ServerAlias www.example1.com
        DocumentRoot /var/www/djangoproject1

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        Alias /static /var/www/djangoproject1/static
        <Directory /var/www/djangoproject1/static>
                Require all granted
        </Directory>

        Alias /static /var/www/djangoproject1/media
        <Directory /var/www/djangoproject1/media>
                Require all granted
        </Directory>

        <Directory /var/www/djangoproject1/project>
                <Files wsgi.py>
                        Require all granted
                </Files>
        </Directory>

        WSGIDaemonProcess djangoproject1 python-home=/var/www/djangoproject1/venv  python-path=/var/www/djangoproject1
        WSGIProcessGroup djangoproject1
        WSGIScriptAlias / /var/www/djangoproject1/project/wsgi.py
</VirtualHost>

djangoproject2.conf (similar to djangoproject1.conf)

<VirtualHost *:8000>
        ServerAdmin webmaster@localhost
        ServerName example2.com
        ServerAlias www.example2.com
        DocumentRoot /var/www/djangoproject2

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        Alias /static /var/www/djangoproject2/static
        <Directory /var/www/djangoproject2/static>
                Require all granted
        </Directory>

        Alias /static /var/www/djangoproject2/media
        <Directory /var/www/djangoproject2/media>
                Require all granted
        </Directory>

        <Directory /var/www/djangoproject2/project>
                <Files wsgi.py>
                        Require all granted
                </Files>
        </Directory>

        WSGIDaemonProcess djangoproject2 python-home=/var/www/djangoproject2/venv  python-path=/var/www/djangoproject2
        WSGIProcessGroup djangoproject2
        WSGIScriptAlias / /var/www/djangoproject2/project/wsgi.py
</VirtualHost>

The apache logs shows the following error multiple times:

(11)Resource temporarily unavailable: mod_wsgi (pid=1498191): Couldn't create worker thread 6 in daemon process 'djangoproject2'.

I would highly appreciate some help with this issue as I have no idea what's causing it and I can't find any solutions to this problem. Any suggestions or advice is welcome.