Why can't this mp3 be played?

<audio id="done" preload="auto" >
    <source src="done.mp3" type="audio/mp3"  autoplay="autoplay" />
</audio>

this mp3 is here

done.mp3

Why can"t firefox chrome make this mp3 play automatically?

Mar.12,2021

Why do you write attributes on audio to source ?

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1eaff17-228d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eaff17-228d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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