i have a problem with plutonium launcher can someone help me please

[lilnayubi]

Hello! , I have a problem with plutonium when I try to launch it the launcher tell me some error.

I already try to reinstall it but every time I try this message show up, And I notice that if I change the name of plutonium.exe (for exemple remove a letter like this).

The launcher open but when I try to login it show me this error

and I already try to make a new account but it still doesn't work.

[lilnayubi]

also when I start the launcher without changing the name plutonium start in lan mode