This is the problem with cloud based software for rent. Users never get a reliable session to work with. It's a goddamn shame.
This issue means that your license is getting registered to more than the limit for your license. Or in some cases one machine is changing addresses too frequently and triggering this. I've reset your license so you should be good to go again and we do have a new system we are testing to replace these limitations. In the meantime would not suggest using Buildbox in conjunction with an APN or similar as you could see this.
When you mention addreses are you referring to http addresses? Right after I posted this I discovered I booted up the software using a VPN rather than my default DNS
IP/MAC Addresses. VPNs will change these frequently which triggers a block after too many times due to fraud. Thankfully we are extremely close to replacing this system in an update with a much better one