Hmm. I'm wondering the file /etc/grub.d/bin/grubcfg_proxy is executed when launching grub customizer. Generally it's reading the original scripts bypassing the grubcfg_proxy.
It says the script /etc/grub.d/bin/grubcfg_proxy became incompatible. That's a problem of older versions of grub customizer that copied a binary file to this location. Newer versions are using a better mechanic.
Try to fix it this way:
sudo rm /etc/grub.d/bin/grubcfg_proxy /etc/grub.d/*_proxy
Then you should be able to launch grub customizer. Some entries may be displayed as removed items. Make sure to restore them before saving the new configuration.
Hmm. I'm wondering the file /etc/grub. d/bin/grubcfg_ proxy is executed when launching grub customizer. Generally it's reading the original scripts bypassing the grubcfg_proxy.
It says the script /etc/grub. d/bin/grubcfg_ proxy became incompatible. That's a problem of older versions of grub customizer that copied a binary file to this location. Newer versions are using a better mechanic.
Try to fix it this way: d/bin/grubcfg_ proxy /etc/grub.d/*_proxy
sudo rm /etc/grub.
Then you should be able to launch grub customizer. Some entries may be displayed as removed items. Make sure to restore them before saving the new configuration.