Hmm by look of it it and seem it is only possibility, you trying to use undeclared log category “YourLog” which seem you just copy pasted. Read “Setting Up Your Own Log Category” section of that wiki page.
Also you dont need to declere category, you can just use LogTemp category which is dedicated for tempery log, there also use GLog->Log() which works with normal FString, but you should use it just for tempery use as it skips log taging process. But if you really looking in to implementing logging in to your code you should definitely declare your own log category and use UE_LOG
Also you can monitor properties states using displayall and getall console commands as well as look on the in property editor by selecting actor in world outliner, if you seek that.