升级Ubuntu 24.04后无法安装grub-pc的问题求助

大家好，我刚把系统升级到Ubuntu 24.04，现在只剩一个棘手的问题没解决：grub-pc始终安装失败，报错信息如下：

Setting up grub-pc (2.12-1ubuntu7) ...
Installing for i386-pc platform.
mdadm: /dev/md does not appear to be an md device
grub-install: error: ioctl RAID_VERSION error: Inappropriate ioctl for device.
dpkg: error processing package grub-pc (--configure):
 installed grub-pc package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 grub-pc
Updating coolwsd systemplate
E: Sub-process /usr/bin/dpkg returned an error code (1)

我的磁盘挂载情况是这样的（执行df命令得到的输出）：

Filesystem      1K-blocks      Used  Available Use% Mounted on
tmpfs             1628216      1816    1626400   1% /run
/dev/md2       1920043304 335436508 1487000140  19% /
tmpfs             8141076         0    8141076   0% /dev/shm
tmpfs                5120         8       5112   1% /run/lock
/dev/md1          1011148    293728     648712  32% /boot
tmpfs             1628212       100    162...

有没有遇到过类似问题的朋友？麻烦帮忙看看该怎么解决这个grub-pc的安装错误，谢谢大家！

备注：内容来源于stack exchange，提问作者user14386454