Can play in minecraft only offline and if I want to start then comes an error message who can

Hey got me new Mienecraft installed everything but can only play offline when I want to start in offline mode then comes an error message who can help

Kind regards

Error Message: Error: Could not create the Java Virtual Machine

Error: A fatal exception has occurred. Program wants Exit

Install Java

I already have it

Am now so far come that the error message comes that I would not be connected to the Internet

Name: Game files are missing

Uninstall Minecraft and Java on your computer. Then you install only the latest version of Java and then Miencraft herewith your problem should actually be solved otherwise I would try to test a new account so create another user on your computer and test it there so I have the problem with me gelößt.