The list gets created and deleted OK but cant edit or enter the list via the web admin.
I get this:
[root@mail tools]#  python3 maillist_admin.py create list@dmain.net only_subscriber_can_post=yes disable_archive=no
Traceback (most recent call last):
  File "maillist_admin.py", line 140, in <module>
    _json = r.json()
  File "/usr/lib/python3.6/site-packages/requests/models.py", line 897, in json
    return complexjson.loads(self.text, **kwargs)
  File "/usr/lib64/python3.6/site-packages/simplejson/__init__.py", line 525, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python3.6/site-packages/simplejson/decoder.py", line 370, in decode
    obj, end = self.raw_decode(s)
  File "/usr/lib64/python3.6/site-packages/simplejson/decoder.py", line 400, in raw_decode
    return self.scan_once(s, idx=_w(s, idx).end())
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[root@mail tools]#  python3 maillist_admin.py delete list@domain.net
Traceback (most recent call last):
  File "maillist_admin.py", line 169, in <module>
    _json = r.json()
  File "/usr/lib/python3.6/site-packages/requests/models.py", line 897, in json
    return complexjson.loads(self.text, **kwargs)
  File "/usr/lib64/python3.6/site-packages/simplejson/__init__.py", line 525, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python3.6/site-packages/simplejson/decoder.py", line 370, in decode
    obj, end = self.raw_decode(s)
  File "/usr/lib64/python3.6/site-packages/simplejson/decoder.py", line 400, in raw_decode
    return self.scan_once(s, idx=_w(s, idx).end())
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

I also see this in the log file: when I try to enter the list via the manager
Nov 17 08:06:56 localhost mlmmjadmin[1704]: Traceback (most recent call last):#012  File "/usr/lib/python2.7/site-packages/web/application.py", line 290, in process#012    return self.handle()#012  File "/usr/lib/python2.7/site-packages/web/application.py", line 281, in handle#012    return self._delegate(fn, self.fvars, args)#012  File "/usr/lib/python2.7/site-packages/web/application.py", line 527, in _delegate#012    mod = __import__(mod, None, None, [""])#012  File "/opt/mlmmjadmin-3.0.4/controllers/profile.py", line 3, in <module>#012    from controllers.decorators import api_acl#012  File "/opt/mlmmjadmin-3.0.4/controllers/decorators.py", line 3, in <module>#012    from libs.utils import get_auth_token, api_render#012  File "/opt/mlmmjadmin-3.0.4/libs/utils.py", line 12#012    def str2bytes(s) -> bytes:#012                     ^#012SyntaxError: invalid syntax
Nov 17 08:06:56 localhost mlmmjadmin[1704]:
Nov 17 08:06:56 localhost mlmmjadmin[1704]: [127.0.0.1] GET /api/list@domain.net 500 84 "-"

and this:
Nov 17 08:11:13 localhost mlmmjadmin[1704]: Traceback (most recent call last):#012  File "/usr/lib/python2.7/site-packages/web/application.py", line 290, in process#012    return self.handle()#012  File "/usr/lib/python2.7/site-packages/web/application.py", line 281, in handle#012    return self._delegate(fn, self.fvars, args)#012  File "/usr/lib/python2.7/site-packages/web/application.py", line 527, in _delegate#012    mod = __import__(mod, None, None, [""])#012  File "/opt/mlmmjadmin-3.0.4/controllers/profile.py", line 3, in <module>#012    from controllers.decorators import api_acl#012  File "/opt/mlmmjadmin-3.0.4/controllers/decorators.py", line 3, in <module>#012    from libs.utils import get_auth_token, api_render#012  File "/opt/mlmmjadmin-3.0.4/libs/utils.py", line 12#012    def str2bytes(s) -> bytes:#012                     ^#012SyntaxError: invalid syntax
Nov 17 08:11:13 localhost mlmmjadmin[1704]:
Nov 17 08:11:13 localhost mlmmjadmin[1704]: [127.0.0.1] DELETE /api/list@domain.net 500 84 "-"

Note: python2.7 in the above cmd

try to set the default python with the cmd below but nothing changes:
alternatives --set python /usr/bin/python3
[root@mail tools]# python --version
Python 3.6.8

[root@ired3 ]# cat /opt/mlmmjadmin/rc_scripts/uwsgi/rhel8.ini
cat: /opt/mlmmjadmin/rc_scripts/uwsgi/rhel8.ini: No such file or directory

[root@ired3 postfix]# cat /opt/mlmmjadmin/rc_scripts/uwsgi/rhel.ini
[uwsgi]
plugins = python,syslog
master = true
vhost = true
enable-threads = true
processes = 5
logger = syslog:mlmmjadmin,local5
log-format = [%(addr)] %(method) %(uri) %(status) %(size) "%(referer)"

http-socket = 127.0.0.1:7790
uid = mlmmj
gid = mlmmj

chdir = /opt/mlmmjadmin
wsgi-file = mlmmjadmin.py

root@ired3 ]# cat /etc/systemd/system/multi-user.target.wants/mlmmjadmin.service
[Unit]
Description=RESTful API server used to manage mlmmj mailing list manager
After=network.target local-fs.target remote-fs.target

[Service]
Type=simple
ExecStartPre=-/usr/bin/mkdir /var/run/mlmmjadmin
ExecStartPre=/usr/bin/chown mlmmj:mlmmj /var/run/mlmmjadmin
ExecStartPre=/usr/bin/chmod 0755 /var/run/mlmmjadmin
ExecStart=/usr/bin/uwsgi --ini /opt/mlmmjadmin/rc_scripts/uwsgi/rhel.ini --pidfile /var/run/mlmmjadmin/mlmmjadmin.pi
ExecStop=/usr/bin/uwsgi --stop /var/run/mlmmjadmin/mlmmjadmin.pid
ExecStopPost=/usr/bin/rm -rf /var/run/mlmmjadmin
KillSignal=SIGTERM
TimeoutStopSec=5
PrivateTmp=true

[Install]
WantedBy=multi-user.target