Visual C++ Runtime Libary, Assertion failed! & Other Error

Okay, so I every time I launch fivereborn I now get this error: Assertion failed!

I can skip it so there is no rush to reply. I believe it has something to do with the size of your monitor?

There is also another error. When I join a server, it does not connect me the first time, it makes an error noise but no message box or crash so I have to restart my game for some weird reason.

Here is the error:

Here is my dxdiag info: