Menu links not working after transfer from domain

Hello all, please check https://www.vidalcreative.com.au/soda/
I just transferred this website from https://www.sodafactory.com.au/

Now if you go to website and click menu options like https://www.vidalcreative.com.au/soda/about, I am getting 404 error,and when I try to go to admin I get pop up for security password (please click link to check) – https://www.vidalcreative.com.au/soda/wp-admin

How can I solve these 2 issues? I have transferred all files, changed home/site url from options table and config file. And updated permalinks also from options table.