Error: java.lang.String cannot be cast to java.math.BigDecimal

[veeceeoh]

You will find another report of this error with more information, and possibly a solution, in this thread:

Unexpected Error in RM 4.0

Whenever I compare the Humidity of a sensor < value, I get the following (very user unfriendly) screen: [Rule_error_1] The note in the log is also very useless: [Rule_error_2] Can somebody please help?