Can’t import comments

Can’t import comments, process stops with error ”
The importer has stopped unexpectedly!”.

Articles import runs just fine, almost 600 in a few seconds.

I think something is wrong on the API: https://www.yurifarina.com/bie/api/comments
A little debug:

[body] => {
“error”: {
“errors”: [
{
“domain”: “global”,
“reason”: “backendError”,
“message”: “Backend Error”
}
],
“code”: 500,
“message”: “Backend Error”
}
}

yurifarina can you help me ? or someone else ?

Thank you!