I have no idea about web development or writing code. However, I used my common sense to replace my domain's credits in a free blogger theme.
The attached picture shows what I exactly wrote:enter image description here
And here is what the error message says:
org.xml.sax.SAXParseException; lineNumber: 3748; columnNumber: 3; The element type "div" must be terminated by the matching end-tag "".
Could someone explain simply how I could fix this?
Somewhere you are missing an ending div, which means you have to sort through the code to find the opening div which does not match with a div on the same indentation level.
This can be solved with a text editor which highlights both opening and closing divs when one div is selected, thus you can see where it is missing and where to add it.
The image doesn't show enough detail to be able to resolve the issue directly for you.