All of my custom Debug logs are not allowing me to compile my code

In C++, capitalisation matters. Your post suggests you’ve used

Declare_Log_Category_Extern(MyLog, Log, All);

Instead of

DECLARE_LOG_CATEGORY_EXTERN(MyLog, Log, All);

And

Define_Log_Category(MyLog);

Instead of

DEFINE_LOG_CATEGORY(MyLog);

Update to use capitals and see if that fixes the issue.

Also, My DEFINE_LOG_CATEGORY are in .cpp and DECLATE_LOG_CATEGORY_EXTERN is in .h