I am currently using the template "photo".
An alphanumeric line appears at the bottom of the screen, which I cannot delete. I found it, but don't know where it is stored. (see picture)

Sorry I dont know where the numbers comes from.
Live Url please..

www.mondwind.com

Sorry this code is not a part of our theme
I dont know where it comes from, maybe it comes from one of your extension.
Take a look at our org theme, there is no such a code
view-source:https://demo.joomlaplates.com/jp_photo/

Problem solved.