Error Message Rendering Macro - Multivote does not have matching type of 6...

Hello togehter,

we have a probem with an Multivote on a blog post - this is activated for severel days and suddenly it can´t be used anymore - error message:
Fehler beim Rendern des Makros 'multivote': key 'multivote.multivote_F5659_1541171008173.2018-11-02T16:03:28.194p1' does not have matching type of 6

It´s the first time that we have a problem with the multivote plugin, so we would be very happy to understand the reason of this error message.

Thanks for your help!
Best regards Sylvia Otte