For some reason I'm unable to access the 3CX management console locally or externally. When I go to the management address using both https and http I get the error message "504 Gateway Time-out nginx/1.9.11". This happened previously when I configured the http and https ports as 5000 and 5001, I reinstalled using 80 and 443 instead but the issue is now occurring again. Has anyone had experience with this? Thanks.