SSL error from Elastic webhook. What does it mean?

Dear all =)

I have created a webhook in Elastic, but when Elastic connects to the client it logs

SSL_accept: ssl/record/ssl3_record.c:322: error:1408F09C:SSL routines:ssl3_get_record:http request

Can anyone explain what the error means? And ideally how I perhaps can solve it? =)

Hugs,
Sandra =)

Where exactly do you see that error? That's not an Elasticsearch error message.

Yeah that looks like curl to me.