I noticed VCC has not done everything with upgrading to 3.4.0 and still forgot some files. Two times 0Harmony.dll are there, causing a lot red warnings in Unity. Problem: which file must deleted? But there is more. VCC and SDK need more adjustments to make error-free 3.4.0 update. Here are my steps and what happens. Steps: Start at 3.3.0 (pic #1 / #2) Let VCC update to 3.4.0, you will see the warning. (Which is good) (pic #3) After update, ClientSim is not more in list. UdonSharp is still in list. (pic #4) (pic #5) Errors can seen here (pic #6) There are indeed two 0Harmony.dll files, but.... which one must deleted? We don't want see this problem again. (pic #7) Others say Udonsharp package should removed. https://feedback.vrchat.com/creator-companion/p/old-udonsharp-package-is-not-removed-when-updating-to-sdk-340 When i delete it from Package (pic #8), VCC is not more showing Udonsharp in list (pic #9). Good? Start Unity up. it says some packages are missing (pic #10) - in this part Udonsharp. Failed to get package and we have still broken Udonsharp (cant add, incompatible, couldn't resolve) so SDK don't know how to fix it EVEN it has already Udonsharp built-in? And we cannot solve it. VCC reinstall Base 3.4.0 didn't also NOT solve it. (we know SDK has both built-in, should fix it by itself!) and means SDK cannot solve it, neither VCC can solve it. I repeated steps again and problem stays there. My conclusion is: VCC and SDK failed to fix the problems for us. Even rookie creator don't know what is going on, and we will see more posts on VRChat Discord. Yeah, that is not good. It's also weird to see why old package Udonsharp is still there (and should removed according other report) but delete it manually makes things only worser. I strongly suggest make fix for VCC (and also SDK) to fix update problems: must delete one 0Harmony.dll file OR remove correctly old Udonsharp map. Because you can see at screenshots Udonsharp is still in the list. It was not properly removed! Please make it urgent fix, many people will have problem with updating to 3.4.0, confirmed in my 2 projects with same problems, and i see more reports from others in VRChat Discord. Thank you very much.