pycharm激活错误提示：JetBrains Account connection error: java.security.Signatur...256 but was expecting 512

报错：
JetBrains Account connection error: java.security.SignatureException: Signature length not correct: got 256 but was expecting 512

解决：在help - edit custom vm options中加一行配置:
-Djava.net.preferIPv4Stack=true
然后重启pycharm，重新register你的学生账户密码

https://blog.csdn.net/getture/article/details/108807774