Why can't I start Window through Grub?

I used to start Windows, through ubuntu"s Grub, but now I suddenly can"t. I took a look at the efi file. What is the reason for reporting this error?
(now you can only start Windows by changing BIOS)

Operating-system windows linux
Dec.28,2021

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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-64f5-1e94ce1-472e0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e94ce1-472e0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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