Hi there!
Thanks for informing me.
Regarding the DFEHC_MAX_SERVER_LOAD, it’s still a valid function that works just fine. The plugin makes use of it as it needs to be compatible with older and newer server software. As soon as a future version of PHP will be announced that won’t support it anymore, I will make sure that the plugin will be updated as well.
It looks like your setup might either be incompatible or you have a firewall blocking additional data like the server load from being fetched.
Can you kindly let me know your current server setup? As well as do you have additional plugins installed that might control the heartbeat and your PHP version? Please create and post a link to yourphpinfo(); output
Looking forward to hearing back from you!