This timeout error indicates that your site currently blocks all incoming connections from WordPress.com. I noticed that your site is hosted with GoDaddy, on a shared Windows server. In the past few weeks, other GoDaddy users reported similar issues; they were also hosted on a Windows server.
GoDaddy is aware of the issue, and recommends to all users experiencing issues with their Windows servers to switch to a Linux server instead. To do so, go to your site management panel, and try the following:
1) Click the + next to the hosting
2) Clicked on options, then the customize tab
3) Select the drop down menu under “Plan” and scroll up to select Linux
According to GoDaddy, it can take up to 48 hours for the changes to apply, but your site will be completely transferred, and you will then be able to use Jetpack.
If you do not feel comfortable making the change by yourself, do not hesitate to contact GoDaddy to let them know about the issue.