Hello,
When you visit your wordpress site, does the request complete or does it keep loading in the browser?
If it completes quickly, you should enable and check the WordPress debug log.
If it hangs and keeps loading, or times out after a round multiple of 10 or 15 seconds (e.g. 10,15,20,30,40,45,60 seconds), then this is typically an indication that the plugin tries to communicate to your wallet server, but encounters a firewall. This is typically your hosting provider’s firewall disallowing outgoing communication.
Talk to your WordPress host and explain to them that you need outgoing TCP connections to the port you’re using and to your wallet server’s IP. They will be able to add an exception rule to their firewall.
Let me know if after this you are not able to resolve the issue.
with regards