WordPress theme behaving bad - php

Question

Hope you all are doing great since last few days i am facing an issue with my WordPress site this is a plugin or theme i am not sure but the file is in theme which throws error of undefined function
because of this error i am not able to open my customize menu from wordpress admin panel
and once i commented the code line where this code exists it start working but widgets does not work properly like if i enable social icons in widgets i wont be able to disable them and save settings here is the code i have commented.
$jobcareer_opt_array = array(
'name' => esc_html__('Title', 'jobcareer'),
'desc' => '',
'hint_text' => '',
'echo' => true,
'field_params' => array(
'std' => esc_attr($jobcareer_widget_title),
/*'id' => cs_allow_special_char($this-
>get_field_id('title')),*/
'classes' => '',
/*'cust_id' => cs_allow_special_char($this-
>get_field_name('title')),*/
/*'cust_name' => cs_allow_special_char($this-
>get_field_name('title')),*/
'return' => true,
'required' => false
),
);

Answer 1

May be there is some version conflict between the theme and Codestar plugin. You can ask your theme's developer for that. Or as a temporary solution just remove cs_allow_special_char function and use its parameter insteaad. For example replace
cs_allow_special_char($this->get_field_name('title'))
with
$this->get_field_name('title')
and it should work then.
I checked the plugin's source, that function doesn't do any critical operation:
function cs_allow_special_char($input = ''){
$output = $input;
return $output;
}