As Pro Evolution Soccer 2018 launched on both PC and consoles on Thursday, computer players detected a couple of server-side errors when trying to connect to the online service. Konami acknowledged those and took quick action, as an update patch was launched on Friday, apparently fixing the infamous CODE GKCC2 and CODE QIMJ693-0.
As reported by Konami themselves, Patch 1.01.01 is a must to "alleviate this issue", so its download is highly recommended.
Other than that users with pretty capable computers have been noticing graphics weren't top-notch, but this didn't require any update or fix - it's just default graphics are on average settings, and you have to tune them up to meet their eye-candy requirements.