Not sure why this is here:

{
    // normal code here
   
    thread handleLoopingRotation( "platform targetname");
}

Th...

The reason you are getting that error is because you missed a bracket.

Change this:

rotation_origin rotateTo( rotation_origin.angles + rotation_vector), 5 );

to th...

Yeah, its issue in Win10, I have it as well. Just turn down graphic settings and it should be fixed

Tried other browsers?

Uninstall T4M, if you have it in use. If not, then turn down graphics settings until it works