Hello,

I have encountered an issue when opening an xml file from emacs 30, here is
how to reproduce:
1. start emacs with 'emacs -Q -mm'
2. enable editorconfig-mode with 'M-x editorconfig-mode'
3. open an xml file, e.g., pom.xml from a Java project.
4. observe the minibuffer:

For information about GNU Emacs and the GNU system, type C-h C-a.
funcall-interactively: Text is read-only [10 times]
Quit
Editorconfig mode enabled
Quit
pom.xml has auto save data; consider M-x recover-this-file
Using vacuous schema
Unsupported element in ‘editorconfig-indentation-alist’:
((nxml-attribute-indent . 2) . 2)
Directory-local variables error: (wrong-type-argument listp Unsupported
element in ‘editorconfig-indentation-alist’: ((nxml-attribute-indent . 2) .
2))


My '.editorconfig' content:

root = true
[*]
charset = utf-8
end_of_line = lf
insert_final_newline = true
trim_trailing_whitespace = true
indent_style = space
indent_size = 2
[*.{java,proto}]
indent_size = 4

Best regards,
minh