Warning: Cannot assign an empty string to a string offset in

Warning: Cannot assign an empty string to a string offset in wp-includes/class.wp-scripts.php on line 447

The developers just need to add an !empty conditional for $value around line 443… I.e:

		foreach ( (array) $l10n as $key => $value ) {
			if ( !is_scalar($value) )
				continue;

			$l10n[$key] = html_entity_decode( (string) $value, ENT_QUOTES, 'UTF-8');
		}

to...

		foreach ( (array) $l10n as $key => $value ) {
			if ( !is_scalar($value) )
				continue;

			if (!empty($value)) {
				$l10n[$key] = html_entity_decode( (string) $value, ENT_QUOTES, 'UTF-8');
			}
		}

sumber:
https://wordpress.org/support/topic/warning-cannot-assign-an-empty-string-to-a-string-offset-2/