An uncaught Exception was encountered Type: Mpdf\MpdfException

dear team i got that error bellow when i tried to add this ৳ currency symbol and then generated a pdf ,
please help

An uncaught Exception was encountered

Type: Mpdf\MpdfException

Message: Cannot find TTF TrueType font file “FreeSerif.ttf” in configured font directories.

Filename: /siteaddress/vendor/mpdf/mpdf/src/Fonts/FontFileFinder.php

—SNIP—

We don’t need the entire exception
This error will tell you what to do:

Cannot find TTF TrueType font file “FreeSerif.ttf” in configured font directories.

Unfortunately we cannot help you with installing fonts on your server.

what should i do ?
tell me i will ask my hosting providor

On the server the font FreeSerif.ttf missing in the configured font directories

You could ask your host to add that font to the server.

Dear if i can ask how and where to download it please