You've received an autocad message that looks something like this:
It turns out that the server http://tbn2net.appspot.com that managed the licenses of all the TBN2NET plugins until the beginning of June 2017 is being disabled. This is because of the high values ??that Google was charging me to keep it up. See more here: http://tbn2.blogspot.com.br/2017/06/tbn2net-em-novo-endereco.html
To correct this error, enter the new address: https://tbn2net.com/programas.php and download the latest version here, here's how to update it correctly here: Registry If there is an error, see the solution here: Errors And Solutions.