Missing File while installing additional toolbox

Hi,

I have installed 2021a verions successfully on my ubuntu 20.04 LTS. Now I am trying to install additional toolbox but when I try to do it I am facing following error. Please give sugeestions to fix this issue.

help/simulink/helpsearch/segments_12(No such file or directory) For more information see this MATLAB Answer. If you need additional assistance contact MathWorks Support.