The full error from the K2 server is '(Unknown)' when sending task email

  • 15 February 2022
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The full error from the K2 server is '(Unknown)'error when sending task email

kbt148312

PRODUCT
K2 Five
This article was created in response to a support issue logged with K2. The content may include typographical errors and may be revised at any time without notice. This article is not considered official documentation for K2 software and is provided "as is" with no warranties.

Issue

When a mail with a configured action as a response to a assigned task is sent, an error from the K2 server is returned:
"The full error from the K2 server is '(Unknown)'"

Symptoms

The error generally appears on workflows even if a mail is successfully sent.

Troubleshooting Steps

Investigating the mail should reveal that there's no serial number. (If users don't customize the notification email [and K2 sends out a default one] then it will be a string in very small font and light grey in colour at the bottom of the email).
It's a serial number that should start with "SN=xx_yy" and is easy to find using the search function on a mail.
If you choose "customize email" it should autopopulate serial numbers. In other words: The serial number can be provided in the task notification email via out of the box notification or when customizing the notification you can use the context browser to place the serial number in the notification.

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