Why display" unsupported time period 0
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When on event handler to setting email alarm .when have a alarm and send a email to mailbox .that is ok.And I ticked "disable " button and saved on event handler. then I untick "disable" button and display "unsupported time period 0,I donot know how to solve it .
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I was unable to reproduce, what version of Mango is this?
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The mango version is 2.4.0.