For the past 4 weeks I have gotten an unspecified error whenever trying to download anything

Every time I paste a link from YouTube into the downloader, I am given an error before the link that simply says 'error', with no specification of what kind of error or of how to fix the error. The program hasn't worked at all in the past few weeks, and I have redownloaded it multiple times. It used to work before I updated it to 4.11.