502 Bad Gateway

the version is Version 2.6.3

Hello Alberto González Alonso
Could it be that you are working with an outdated version of WPC-PRO?
The current version is 2.6.3.
Could you check it out?
If you still have problems I suggest you contact us via live webchat or via the contact form at the link altoswebsolutions.com/contact-us

thank you
David
at2095

Hello, we have integrated your plugin to make a price calculation, if we do tests buying the product without being logged in, there is no problem, add it correctly to the cart, but when adding the product while logged in, it gives us an error 502, we have increased the resources of the server, activated debugging without appearing any error, in the server logs This warning appears AH01071: Got error 'PHP message: PHP Notice: Undefined index: aws_price_calc_18 in /wp-content/plugins/excel-worksheet-price- calculation / admin / awspricecalculator / Helper / CalculatorHelper.php on line 1084 \ n '
if I deactivate your plugin there is no longer any problem but when I activate it, what I have told you happens.
our website carries elementor, buddypress, woocommerce apart from its plugin.

I would appreciate your help
thanks