I just got my first invitation to interview (YAY!). But I can't respond to it. (BOO!) I've tried responding to the invitation on both my iPhone and my computer with no result. What can be going on here?
I checked and it looks like the job post you're referring to has been canceled and is no longer available. You can check this by going to your Proposals > Archived tab. Please check out these great resources to help you get started on Upwork!