Index Search Engine: Invalid or Empty Node passed to getItem constructor.

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While starting the automated job for updating the Search Engine index i get this exception: Invalid or Empty Node passed to getItem constructor.

Did anybody else get this error when updating the Search Engine index?

I tried to check the logs but nothing is written there. How can I solve this?

Please help me.

My concrete5 version is: 5.7.5.13

arael78