Hello,
Thank you for reaching out to us.
1/ Please enable debug mode in WordPress – https://wordpress.org/support/article/debugging-in-wordpress/ to find out what error appears on your site, it will point you in the right direction and what needs to be fixed.
2/ Provide correct temporary wp-admin access https://prnt.sc/6b-pUXmE02u0 and FTP access.
Best Regards,
8Theme’s Team