Nuki and ioBroker Error

Hello

I have integrated 2 Nukis in ioBroker and I get the following error messages:

getWebApi(): Error retrieving notifications: 500 - {“code”:500,“description”:“The server encountered an unexpected condition which prevented it from fulfilling the request”,“homeRef”:"/",“reasonPhrase”:“Internal Server Error”,“uri”:“HTTP/1.1: Status Code Definitions”}

Can you help me please?