OpenSearch Alerting failed to update the Monitor

[Dexter_96]

HI Folks ,
I tried To create a new Monitor With Very Basic Query ,
The Query Set to Per Document Monitor i set a Slack Message as Trigger ,
when i click on Update i got this Error :

Did Someone Deal with this issue?

[pablo]

@Dexter_96 What do you mean by the very basic Alert? Could you share it?

[Dexter_96]

The fields and the Value is correct .