Re-naming Admin creates php errors

[kuroi]

The warning tells us that there is a problem at the end of your configure.php file (as you have confirmed). As the file is normally only half this length, the problem is probably due to a problem with the way in which the app which you are using to upload the file is configured. It's probably causing the file to be double-spaced by mishandling the invisible line end characters.

If your configure file has a closing php tag at the end ("?>") then the problem would be that this doubling up has resulting in there being a non-printing character output after that tag. In which case, counter-intuitive though it may sound, simply deleting the tag would also have resolved the problem for you. In general, it's a good idea nowadays to leave the final php closing tag off the end of files specifically to avoid the problem that you had.

https://www.zen-cart.com/tutorials/i...hp?article=313
https://www.zen-cart.com/tutorials/index.php?article=87