Thank you.
To be clear, the information I am looking for would be in your WordPress debug log. The screenshots you sent me are the JSON API response, and the coin adapters screen. The adapter is indeed in a responding state, which is a good sign.
So, if you have not already done so, please do the following:
1. Enable debugging by adding to your wp-config.php:
define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', false );
Then, visit the get_coins_info JSON API call again.
Afterwards view the file wp-content/debug.log. The debug information will be in there. Look for the lines with the date/time that you performed the API call at.
2. About the firewalls: There might be more than one types of firewalls/security programs on the WordPress server and the wallet server. You can disable them for testing, but do not keep them disabled. You should understand how they work and allow TCP connections outgoing from your WordPress server to your wallet server on port 44062. Are these on separate machines or on the same machine? If they are on the same machine, then it is not likely that a firewall is the problem.
3. Finally, if you like, show me how you added your coin to the multi-coin adapter, as there might be some issue there.