Grub2 commands fail with error /usr/bin/grub2-editenv: error: invalid environment block or error: environment block too small

Issue

• Failed to change default kernel entry. Note: In below example, we are using 1 (Second kernel from grub.cfgfile)

  [root@rhel~]# grub2-set-default 1
  /usr/bin/grub2-editenv: error: invalid environment block.
  /usr/bin/grub2-editenv: error: invalid environment block.
  /usr/bin/grub2-editenv: error: invalid environment block.
  

  [root@rhel~]# grub2-set-default 1
  /usr/bin/grub2-editenv: error: environment block too small.
  

• grub2-mkconfig fails with environment block too small.

  [root@rhel~]# grub2-mkconfig -o /boot/grub2/grub.cfg
  Generating grub configuration file ...
  /usr/bin/grub2-editenv: error: environment block too small.