Two ways:
Check if automated root certificate update is turned off, if it is then turn it on. It will auto update the certificate. (In my case can’t find the automatic option)
Export the ISGR Root X1 certificate from some other machine and install it in yours. (Export CA from Mozila FireFox and Import it to Brave)
In my case can’t find automatic update certificate option. So I go with second option.
Video Solution: https://youtu.be/XroUD7XiEg0
Install Mozila FireFox and Export ISGR Root X1 CA (settings->Manage certificates->view certificates->authorities->ISGR Root X1->export
) and Install it on Brave (brave://settings/security
→ Manage certificates
→ install
).
Problem Solved.