I have a WordPress website with multilingual (Polylan WP plugin). And these are on separate subdomain. eg. and is default site (Primary language). I pointed same as And site is working fine. But, there are showing “strict-origin-when-cross-origin” with 403 when I try to submit a ajax form from

Note: I am trying submit form from .

Request URL:

Request Method:

Status Code:
403 Forbidden

Referrer Policy:

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