Old account problem and re-send mail activation

Hello,

Version PHP/MySQL : PHP 8.0.0/ mariadb-10.3 1
Server VPS Xeon 8 core – 32 Go DDR4 – SSD M.2 – Ubuntu 20.04.1 LTS – Plesk Obsidian v18.0.32
WordPress 5.6

When I purchased this theme, all accounts were found to be disabled.
for me it didn’t matter because users could click on “Resend activation link!”
But since the new theme design the link “Resend activation link!” does not work anymore

New users receive their email so it’s ok
but the old accounts can no longer receive the activation email

The only solution found is to manually activate the accounts, but I have more than 500 accounts, and it is getting hard to activate 500 accounts manually

Do you have a solution ?

Thank you 🙂