Can't solve a 503 Admin.ajax GET error with my Wordpress Website.

Having issues with a form submission that uses Ajax and can’t figure out what it is, I keep getting a 503 error (https://imgur.com/a/24kJx). I’ve been told from the plugin developer it’s a host issue but my log files are clean and using gravity forms with ajax works just fine.

Wondering if anyone can help me make sense of the error and the code that’s flagging the error (or at least I think it’s the right code). The plugin is from iHomefinder (Optima Express) so I have a hard time believing it’s an issue with them as they have thousands of people most likely with it installed and Im sure they would be aware of it.

(function(){
	var a=function(){
		var c=jQuery("#ihf-main-container #ihf-main-container");
		c.each(function(){
			var e=jQuery(this);
			var d=e.children();
			d.insertBefore(e);e.remove()})};
	var b=function(){
		jQuery("[data-ihf-remote-submit=true]:not([data-ihf-remote-submit-bound])").each(function(){
			var c=jQuery(this);
			c.attr("data-ihf-remote-submit-bound",true);
			var d=c.find("form").addBack("form");
			d.on("submit",function(g){
				g.preventDefault();
				var e=jQuery(this);
				var i=e.find("button[type=submit]");
				i.attr("disabled",true);
				var f=e.attr("action");
				var j=e.attr("method");
				var h=e.serializeArray();
				jQuery.ajax({
					url:f,type:j,data:h,success:function(k){
						c.replaceWith(k);a()
					},
					error:function(){
						c.replaceWith("Error 988a")
					}
				})
			})
		})
	};
				b();jQuery(document).on("ready",function(){b()})})();

From my understanding this error has to do with to many requests being sent to Admin-ajax.php. Im using serverpilot for this and checked the nginx, apache, and php error logs and they were empty.

other things I’ve tried include the following:

• Changing themes (no change)
• disabling all plugins with the exception of Optima Express (no change)
• Rebooted my server (no change)
• Rebooted PHP (no change)
• Increased memory limit (no change)
• Installed the heartbeat plugin (no change)

I have the site on Cloudflare as well but have enabled development mode and cleared the cache with no notable change.

Hoping some fresh eyes can give me some ideas on what else I can try.