更新：該問題於2018/9/28已修復。附郵件：
Hi Morris,
Thank you for your update.
I would like to tell you that we had some issues in the last 2 days with the activation server and thus you have experienced such errors. Things should be back to normal now so if you try to activate other VMs with a different email address it should work.
Let me know if otherwise.
Adrian
前幾天公司培訓LoadRunner，但是卻怎么也打不開Controller，提示No valid license。
眾所周知， LoadRunner Community Edition提供了免費的Community License。但是打開LoadRunne License Utility，點擊Sign up for free License，在輸入完一系列姓名郵箱公司職位之后，只看到一個“Successfully subscribed, check mailbox for next step”的提示就沒有然后了，也沒有收到任何郵件。
最后在LoadRunner社區上看到了這篇帖子：
https://community.softwaregrp.com/t5/LoadRunner-User-Discussions/LoadRunner-12-60-Community-License-not-working/m-p/1667624
根據Shlomi Nissim的回復，這個問題應該是域名更改維護導致的。
Re: LoadRunner 12.60 Community License not working
To whom it may concern,
I shared with Cristian his activation code.
I assume a few more trial users experienced the same issue since last week there was maintenance due domain name changes. If you experience an issue of this nature please let me know.
Regards,
Shlomi
大概總結一下，如果你想要Community License，首先你的電腦必須可以聯網，其次你要填郵件地址，然后你就會收到包含激活碼的郵件。可能是因為域名或者維護的原因，導致了我們收不到激活碼，自然無法繼續下一步的激活License。
所以解決方法的話，我今天剛給Shlomi Nissim發了站內信，提供了我注冊時的電子郵件地址，希望很快就可以有回復。
着急用的同學可以也自己注冊一個賬號然后給他發信試一下，不急的話過一段時間License的功能就應該會恢復了吧。