I got this information from pabbly:
Hello Karin Immler,Task History ID: IjU3NjYwNTY4MDYzMTA0MzM1MjY0NTUzMDUxM2I1MTZhNTQzOSI_3D_pc
This email is to notify you that for the workflow "zago-kinderkurs" , a recent task was not executed due to following error -
Step Name: Zagomail > Add Tag To Subscriber
Task Error Detail:
"message": "Required field Subscriber UID missing. Learn more: https://forum.pabbly.com/threads/how-to-fix-required-field-is-missing-errors-in-pabbly-connect.7488/"
Controlling the workflow there is listet the "Data record subscriber UID". Isnt this the correct information?