Error with Laravel Seed

I'm setting this up with laravel and everything has worked except when I try php artisan migrate --seed. It throws this error:

Call to undefined function Termwind\ValueObjects\mb_strimwidth()

at vendor\nunomaduro\termwind\src\ValueObjects\Styles.php:1052
1048â–• */
1049â–• private static function trimText(string $text, int $width): string
1050â–• {
1051â–• preg_match_all(self::STYLING_REGEX, $text, $matches, PREG_OFFSET_CAPTURE);
➜ 1052▕ $text = rtrim(mb_strimwidth(preg_replace(self::STYLING_REGEX, '', $text) ?? '', 0, $width, '', 'UTF-8'));
1053â–•
1054â–• // @phpstan-ignore-next-line
1055â–• foreach ($matches[0] ?? [] as [$part, $index]) {
1056â–• $text = substr($text, 0, $index).$part.substr($text, $index, null);

1 vendor\nunomaduro\termwind\src\ValueObjects\Styles.php:870
Termwind\ValueObjects\Styles::trimText("........................................................................................................................")

2 vendor\nunomaduro\termwind\src\ValueObjects\Styles.php:732
Termwind\ValueObjects\Styles::applyWidth("........................................................................................................................")