Python Pluginserver unable to start

The only related or partially-related similar threads I could find are:

Finally, I’ll add that nginx is being run as kong:

kong@proxy-kong-86696bcdb5-glwx7:/$ ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
kong         1  0.1  0.1 416500 60796 ?        Ss   19:15   0:00 nginx: master process /usr/local/openresty/nginx/sbin/nginx -p /usr/local/kong -c nginx.conf
kong      1202  0.2  0.3 598200 102788 ?       S    19:15   0:01 nginx: worker process
kong      1203  0.1  0.3 622032 127968 ?       S    19:15   0:00 nginx: worker process

Please let me know if I can provide more diagnostic info. Thank you!