Generic ERROR! frrom Alexa integration

Hello everyone,
this morning I tried to install the Alexa integration (4.13.2), but I received an unidentified error. After clicking on “add integration” and selecting Alexa, a window appeared with all the parameters to enter. After entering them all, getting them from the various Amazon windows, according to the instructions, I confirmed the data and, after about 5 seconds, a window appeared with a single message: ERROR! Can anyone tell me what this message could refer to?
Thanks.