I submitted a request and got an email back, but I have not heard from since, so I will add additional information here. I tried uninstalling and reinstalling Jetpack, and I tried disabling all other plugins. Same issue. I also have never touched the xmlrpc.php file. This was the error Jetpack was getting on their end: “-32601 ??[faultString] => server error. requested method jetpack.testConnection does not exist.” But the fix they recommended (mentioned above) did not work. My site is bricklist.net. What else can I try?