please check out the solution given by WorldofBB.
I did and it works great (after deleting the browser's history).
For the next time: On desktop systems with Windows or Linux as operating system it's enough to reload the page bypassing the browser cache with the key combination[CTRL]+[F5]. You don't have to delete the whole browser cache.
P.s. When I have some time I need to install another instance of Version 2.4.23, with new SQL database, and test the Backup/Restore function, (I can't see why it did not work in my case until now).
This would be great. I tested my changes with a backup of my own forum and a fresh table structure, created with the table-create-statements from
install/install.sql. It worked. Let's see if this works in your forum too.
Trenne niemals Müll, denn er hat nur eine Silbe!