Hi everyone,
About "Null input buffer" issue, I think it can be solved by adding these 
two keys in your cluster nodes:
cas.webflow.crypto.signing.key=<Secret key for signing>
cas.webflow.crypto.encryption.key=<Secret key for encryption>



On Saturday, February 27, 2021 at 10:50:44 PM UTC+3:30 [email protected] 
wrote:

> Can anyone help me if you address the null issue?
>
> On Tuesday, February 11, 2020 at 10:45:09 PM UTC+5:30 Maksim Kopeyka wrote:
>
>> Hi M.Pedis,
>>
>> Did you solve problem with Null input buffer? I have the same exception.
>>
>> On Thursday, November 7, 2019 at 1:40:54 PM UTC+2, M.Pedis wrote:
>>>
>>> Hi Dave , 
>>>
>>
>>> 2019-11-07 06:02:21,471 ERROR 
>>> [org.apereo.cas.web.flow.executor.EncryptedTranscoder] - <Null input buffer>
>>> java.lang.IllegalArgumentException: Null input buffer
>>>         at javax.crypto.Cipher.doFinal(Cipher.java:2198) ~[?:?]
>>>
>>

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