Unable to build datafixers

Every time I start Minecraft version 1.13, It works smoothly but when it is going to start the splash screen, it doesn't show. I don't know why but i'm not sure what i'm doing. I was using the demo launcher to GET minecraft version 1.13 because I lack libraries of 1.13 and USE it on a cracked minecraft titan launcher. I was changing some things on the .json file of 1.13 but it didn't worked out well.

By the way, I was getting "33:CONTROL" and the "skipping bad option: key.key._____" error but I ignored it.

I also changed my maximum allocation of my launcher to 4 GB.

I'm putting the log of the launcher too.