I would uninstall, and try again there are a lot of reasons for that error (just from google search)
Quote: "There are several causes of runtime errors like Utorrent Error Code Http 502, such as viruses, out of date drivers, missing files or folders, incomplete or poor installation, and registry errors. They can also occur due to an issue with the computer's memory, which may often be due to a hardware problem."
Dave
Windows 10 Pro 64 bit
GeForce RTX™ 2070 GAMING OC 8G
AMD FX (tm)-9590 Eight-core Processor
31.96 GB RAM
3840 x 2160 ,60 Hz