It's a sponsored license, so i have installed the Ansys 2020 R1. The License read as "Academic Research". i haven't got any install.err file in the place you specified. But i do have one error file, with the name "install_licconfig" with the below attached comments.

i had initially uninstalled Ansys from my laptop and reinstalled. It's then that i had got the above error message. I tried again a few times to find and link the license file to the license manager, and later, the license file was accepted and now i have almost all the toolboxes ahown/ the only thing now is, i couldn't find any toolboxes relate to  "Academic Research EM and HF.