I had escalated the matter to the highest level in Resellerclub, and they assigned an expert developer to handle this case and he nailed it.
I am going to let you all know here what we did, that solved this issue, I saw many threads with people had same issue of this error
"The reseller ID and key combination appear to be invalid, or your LogicBoxes account may not be configured to allow API access."
So this is what we did to solve this:
Although I had a shared hosting, I had a Dedicated IP address. And the Problem lies exactly there...
Even thought the domain IP showed the dedicated IP address as you check in
https://www.site24x7.com/find-ip-address-of-web-site.html
But the actual host IP was totally different.
So even if you have dedicated IP address, you need to WHITELIST the HOST IP address in the ResellerClub, and not the Dedicated IP address.
Following was the solution recommended by the ResellerClub Expert, and it worked:
**************************
The issue you are encountering may be because of IP Whitelisting. Please be informed that the shared servers have various IP addresses associated with them and the API call making IP of the server may differ from the actual Web Hosting IP.
I request you to kindly create a test.php file in your hosting panel where you are Hosting 'BLESTA' to find your outbound ip and put the following code in that file given in this url-
http://pastebin.com/9eZzgruh
Then run that code by putting domain-name/test.php on your browser. Kindly let us know the path of the script so that we can check the same at our end. Once you get the IP after running the script, log in to your reseller panel, go to settings->API and whitelist that IP.
After IP whitelisting is done, wait for 2-4 hours and try passing the API call again.
********************
Yes, I put that script to the location where Blesta was installed and it shows the actual IP address of HOST.
I then when and WHITELISTED that HOST IP address and now everything is solved...
I hope this solution will be useful for all other in future who will face the same crisis.
