String length must be a multiple of four

[spring_great]

保存和查询数据的时候都会报这么个错误。。。。这是什么问题？
数据库编码是UTF-8mb4

Caused by: java.lang.IllegalArgumentException: Failed to decrypt.
at com.alibaba.druid.filter.config.ConfigFilter.decrypt(ConfigFilter.java:212)
at com.alibaba.druid.filter.config.ConfigFilter.init(ConfigFilter.java:124)
at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:345)
at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:622)
at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:618)
at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:79)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:81)
at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67)
at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279)
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72)
at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:47)
at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:105)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:152)
... 40 more
Caused by: java.lang.IllegalArgumentException: String length must be a multiple of four.
at com.alibaba.druid.util.Base64.base64ToByteArray(Base64.java:128)
at com.alibaba.druid.util.Base64.base64ToByteArray(Base64.java:110)
at com.alibaba.druid.filter.config.ConfigTools.decrypt(ConfigTools.java:126)
at com.alibaba.druid.filter.config.ConfigFilter.decrypt(ConfigFilter.java:204)

[执笔记忆的空白]

你这个是转码出了问题？参考