If you encounter this error when installing the LingHang theme: Fatal error: Uncaught Error: Call to undefined function Carbon_Fields\Helper\mb_convert_case()
Rest assured, this is not a theme issue; it is because your server's PHP does not have the mbstring extension installed.
Solution
If you have installed the Baota panel environment yourself, you can go to the Baota panel backend, Software Store → Installed → the PHP version you have installed → Install the mbstring extension, and the theme will work normally.
If you are using shared hosting, this extension is usually enabled by default. If it is not enabled, please contact customer service to enable it.
What is mbstring?
mbstringThe extension provides PHP with multibyte string processing functions, which are essential for the following operations:
- Handling non-ASCII characters (such as Chinese characters)
- Performing string case conversion on international text
- Proper text encoding / decoding
