Lyra has_feature compilation error - barsandcat/HMS-Sunflower GitHub Wiki

__has_feature is not defined

Note that __has_feature and __has_extension are not recommended for use in new code, and are only provided for compatibility with Clang. For details of which identifiers are accepted by these function-like macros, see the Clang documentation.

So maybe with 5.5 there have been some updates that depreciate the use of __has_feature

Try updating your msvc to a newer version if yours is no longer seen as ok.

Also take note of the warning in your solution

Usually installing components fixes sudden weird errors like this.
It should update / install missing dependencies. https://forums.unrealengine.com/t/weird-bug-when-creating-or-opening-c-projects/2128315 Did not help

_MS_VER 1939 = Visual Studio 2022 version 17.9