Same problem with Chinese character TAGs

[ijuse]

I have the same problem
I use the/^[\u4e00-\u9fa5\- a-z0-9]{2,30}$/ifor showing Chinese&digit&English characters,
But PHP feedback result is:
tags_manager.php on line 644: preg_match(): Compilation failed: PCRE does not support /L, /l, /N{name}, /U, or /u at offset 3
PCRE does not support?Is it not Full UTF-8 support???

Help me, thank you

[ijuse]

OK I found a solution

look here
https://imgur.com/VKdrqeC

Tag settings——Regular Expression for allowed tags：
Type this
/^[\- a-z0-9\d\D]{3,30}$/i

Perfect~~~~~~~~~~~~~XD