Mailwizz报错Error 503! Application currently offline. Try again later!Mailwizz报错

大部分情况下，服务器迁移后会遇到报错：Error 503! Application currently offline. Try again later!

这个并不奇怪，就是license不允许多个服务器运行，官方解决办法：

https://www.mailwizz.com/kb/this-license-is-already-registered-to-another-mailwizz-instance

reset 后，多等一会。

这个时候，请登录backend后台地址（https://moneyslow.com/backend）是看到报错的：

{"errors":{"license_key":"This license is already registered to another MailWizz instance"},"message":"General error","status":"error"}

找到license选项，输入正确的Purchase code，点击“save change”。https://moneyslow.com/backend/index.php/settings/license

再刷新一下，报错没有了，前台应该也恢复了。

其他相关文章：

Mailwizz重装报错This license is already registered to another MailWizz instance