Post permalink turns to question marks and display 404 error page

  • Hi Chouby,

    I have a multi-lingual setup on my website using polylang plugin with separate domain for each language pointing to the same root directory.

    The posts on the main (default) domain i.e. english works fine, but the domain urdu.example.com gives 404 error page. Also the post title turns to question marks.
    ex: https://example.com/?-?????-????????/

    Can you please help me with this?

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