React, could you take a look at my codepen project and why React didn't render the components?

when doing Pomodoro Clock project on FreeCodeCamp , I encountered the problem that the React component did not render. I would like to ask everyone to take a look at it. The link is as follows, thank you for your guidance!

React Pomodoro Clock

Nov.02,2021

this.decrementSessionLength = this.derementSessionLength.bind(this);

typos derementSessionLength = > decrementBreakLength

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-64f5-1e51618-4511e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e51618-4511e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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