Error in 1c bitrix how to fix?

Question

1C-Bitrix

I click edit component parameters and an error pops up

Answer 1

Perform a system check in Settings > Tools > Configuration Test.
Such an error was met with an incorrect value mbstring.func_overload
. If the value is incorrect, the test will tell it. This is a server setting, it is impossible to change it somewhere in the admin panel or in the project code, you need to contact the server administrator or hosting settings, depending on where the project is located.
For sites in UTF-8 encoding, the parameter value is strictly required:
mbstring.func_overload=2
default_charset=utf-8
If the site does not use UTF-8 encoding, the parameter value is required:
mbstring.func_overload=0

Answer 2

Open the page where you have the component connected not through the Bitrix editor, but through at least notepad++ and check that each individual component is in a separate php code block <?$APPLICATION->IncludeComponent();?> without extra spaces and without something like this : <?$a=$b+$c; $APPLICATION->IncludeComponent();?> - if you find this, then do this:
<?$a=$b+$c;?>
<?$APPLICATION->IncludeComponent();?>
Save, if not help, check the encoding of the file and, if necessary, convert the file to another encoding.