I checked and it looks like you don't have any available Connects in your account at the moment. To purchase Connects, go to Settings > Membership & Connects and click on the green 'Add More Connects' button. From there, select the amount to buy and click on the 'Buy Connects' button. Please note, that if you have sufficient funds on your Upwork balance, the charge will be applied to your Upwork balance. If not, the full amount will be charged to your primary billing method. You can check out this help article for more information.