I took the original .sln file from here: Community Tutorial: Ocean Simulation - #43 by Evil_Pee
Opening the .sln file I see that there are references to Intermediate\ProjectFiles\UE5.vcxproj and Intermediate\ProjectFiles\MyProject2.vcxproj. These files are not supplied with MyProject2.rar, so I can do nothing, sorry. Ask @KryogenicGames for the files; I don’t program in C#.
On the other hand, I lust deleted my copy of all the files and downloaded from Github (my UE 5.3 fork), then recompiled plugin with no problems with Visual Studio Build Tools 2022 v17.7.3