Failed connection to Combu server

There's no known issues with Combu in Unity 2017, I'm using 2017.3 myself without any issue. Check if the URL is correct in the inspector and eventually enable Debug Log on CombuManager inspector to see in the console log of Unity what's returned from server (you could also check your Apache/IIS web error log on the server to see if there's errors).

I have the same issue. Using localhost and debugging it works while on the production server (hosting) it replies with empty strings in ERROR and TEXT.

I do not have any error in the server log and in the app.log. Any idea? 

If you leave me your Skype ID by PM we can schedule a chat to see what could be the issue on your server (I’m usually available in late afternoon/early night in Central European Time, Italy).

I am getting this
ERROR: 401 Unauthorized
Failed connection to Combu server: 401 Unauthorized

Webserver error log
[Sat Apr 07 13:04:04.763165 2018] [access_compat:error] [pid *] [client *] AH01797: client denied by server configuration: /*/combu/_logs/
[Sat Apr 07 12:53:58.135728 2018] [access_compat:error] [pid *] [client *] AH01797: client denied by server configuration: /*/combu/_logs/
[Sat Apr 07 12:49:42.617389 2018] [access_compat:error] [pid *] [client *] AH01797: client denied by server configuration: /****/combu/_logs/

Did you follow the steps to create the App on admin and set its AppId and SecretKey in Unity?

If you are running 3.0.14 and created a new configuration file with the previous version may be you have wrong values in config.php for MIN_CLIENT_VERSION and MAX_CLIENT_VERSION, they should be empty string if you don't want to limit the access by client Combu version number.

I just put 3 val for MIN_CLIENT_VERSION and Max
did not know what to put

MIN_CLIENT_VERSION is the minimum and MAX_CLIENT_VERSION is the maximum version of Combu that clients must have to be allowed to do requests to API else their connections will be refused. This is something you may want to set on a live game when you have a server and want to be sure all clients are updated, for prototyping and during development/test you may want to set them empty.

without having to redo the whole config file over again
What should the line resemble

define ("MIN_CLIENT_VERSION", 3);
define ("MAX_CLIENT_VERSION", 3);

Oh that code is totally wrong, they're not numbers but strings of Combu version (for example: "3.0.15").

Anyway for now you can leave them empty:

define ("MIN_CLIENT_VERSION", "");
define ("MAX_CLIENT_VERSION", "");

Thanks that worked
Also can you remove that ip address above (in my reply) I did not mean to add that

TowerGuardian said
Thanks that worked
Also can you remove that ip address above (in my reply) I did not mean to add that  

Sure, I've censored most personal data.

Thanks man

So far good product