Failed to load resource: An SSL error has occurred and a secure connection to the server cannot be made

Только на ios получаю ошибку

Failed to load resource: An SSL error has occurred and a secure connection to the server cannot be made.

При чем происходит это только при двух запросах: POST '/signin' и '/realestate/offers/search' . Остальные на тот же API отрабатывают нормально.

ЗАПРОС:

:authority: api.domain.com
:method: GET
:path: /v1/realestate/offers/search?id=39ggqqpq5e5ydcw4478heedj5p
:scheme: https
accept: application/json, text/plain, /
accept-encoding: gzip, deflate, br
accept-language: en
cache-control: no-cache
content-language: en
content-type: application/json
cookie: sessionid=ytq0prjkfbgx6x7ll1r2flf9u9wpsj8e; _ga=GA1.2.1566636948.1524832691; _gid=GA1.2.556879757.1525968472; session=a94bc4fa-244d-4468-9993-7f0b63b78eec.2meJ0XX3qFxsTz4MzFIlHaWn9M4

origin: https://domain.com
pragma: no-cache
referer: https://domain.org/en/realty-ukraine-kyiv-darnytskyi-district-39ggqqpq5e5ydcw4478heedj5p

user-agent: Mozilla/5.0 (iPhone; CPU iPhone OS 9_0_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13A405 Safari/601.1