Can’t access files in the shared drive

Hi, I saved a file on our shared network drive and in my email, I created a hyperlink to this file before sending it to people who should be able to access the file.
They were all able to receive my email but when they tried to open the link, they were all unable to do so and got the message “This file can’t be opened”. I checked the file again and it’s where I have saved it.
Why couldn’t they open the file?
