500 ajax error

I am using version 2.6.65 of plugin.
I have an error at checkout seen in javascript console:

/checkout/?wc-ajax=checkout:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)

I have checked plugin log entries: Log entries success. Can’t see any problems here.

My localhost server php.log containes:

Stack trace:
#0 C:\laragon\www\hdri-skies\wp-includes\class-wp-hook.php(286): WC_Braintree_Payment_Gateway::maybe_update_order_status('processing', 315079)
#1 C:\laragon\www\hdri-skies\wp-includes\plugin.php(203): WP_Hook->apply_filters('processing', Array)
#2 C:\laragon\www\hdri-skies\wp-content\plugins\woocommerce\includes\abstracts\abstract-wc-order.php(2313): apply_filters('woocommerce_pay...', 'processing', 315079)
#3 C:\laragon\www\hdri-skies\wp-content\plugins\woo-payment-gateway\includes\class-wc-braintree-gateway.php(285): WC_Abstract_Order->payment_complete('j6fqsh2k')
#4 C:\laragon\www\hdri-skies\wp-includes\class-wp-hook.php(286): WC_Braintree_Payment_Gateway->process_o in C:\laragon\www\hdri-skies\wp-content\plugins\woo-payment-gateway\includes\class-wc-braintree-gateway.php on line 1008

What can be a problem ?