The problem there is that template probably hasn't been updated to work with PHP 7.2 and above. Split was a depreciated function a while ago (replaced by explode) but there are other scenarios which will like cause errors unless it's properly reviewed. There may be a more updated version if you search the forums but I'm not aware of it as I haven't used that template.

Thank you for your guide,
I use explode instead of split, then it had no error now.