not connected

i have tried and follow the instruction but in the end still not connected

6 September 2020 15:10:30 PHP 7.2.32Array
(
[ERROR_MSG] => invalid_grant, Malformed auth code.
[TRACE_STK] => #0 /home/u1092211/public_html/wp-content/plugins/cf-google-sheets/includes/class-cfgs-service.php(55): cfgooglesheet->auth(‘JCLc1SDUIKawlob…’)
#1 /home/u1092211/public_html/wp-includes/class-wp-hook.php(287): Cfgs_Connector_Service->verify_gs_integation(”)
#2 /home/u1092211/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(”, Array)
#3 /home/u1092211/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#4 /home/u1092211/public_html/wp-admin/admin-ajax.php(176): do_action(‘wp_ajax_verify_…’)
#5 {main}
)