是因為IDEA注冊碼的問題，
解決方案：
修改此路徑的hosts文件：C:\Windows\System32\drivers\etc\hosts
在其最后一行加入：“0.0.0.0 account.jetbrains.com”
保存即可。然后退出IDEA,重新獲取注冊碼打開就好了。
ItelliJ IDEA下載及獲取注冊碼詳解
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