Link is not sent in the email

Hi, the email is beeing sent correctly but there is no link for the file. It is just the file name.
There is no cache plugin and before aa few months it was working properly.
This is the file that should be donwloaded https://kkontomari.com/wp-content/uploads/dae-uploads/O-10λογο?-του-ηγετη-ebook.pdf

and this is the email text:

`Γει? σα?,

Ευχαριστο?με για την εγγραφ? σα?.

Μπορε?τε να βρε?τε το ebook εδ?: O-10λογο?-του-ηγετη-ebook.pdf`
No link included.

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