Issues install OCS Server v3

Question

hello, I'm trying to install OCS3 with these guidelines
Everything went good. But I'm experiencing the following problem after configuring the front and backend adress. I get this: Network Error. 

Front and backend are running on the same server. I changed the DNS entry's for the front and backend like in the doc. 

Is there a way to check that the front-end has connection with the back-end? Logs in the backend are pretty empty. Nginx logs are not telling something. I

 I already disabled UFW. I'm running this on a ubuntu 24.04.4 LTS
So I'm pretty stuck :-)

Do you need more info, I'll happy to give it :-)
Kind regards

Answer 1

I was have the same issue.
But try next:
on the nginx site for backend choose the different port like
listen 8080
for backend - leave default 80

For both files set server_name(or IP)
Dont forget change external IP/server_name in config.json file
This is it.