www.domainname/wp-admin/post.php

I am getting the following problem after updating some plugins including wordpress. Why did I do it?

My website is an ecommerce website. I have installed WooCommerce Plugin.

When I click Products and the click edit to make some changes in a product page on my website, I started getting problem. I am unable to save draft, update and also unable to see preview. As I click Save draft, Update or Preview button, it opens the following link:

https://www.domainname/wp-admin/post.php

with the following error:

This page isn’t working
https://www.domainname is currently unable to handle this request.
HTTP ERROR 500

I started google to find any resolution for this problem. I tried the following resolutions but nothing worked:
1. Tried to check whether .htaccess file is corrupted. This process did not work.
2. Deactivated all plugins except woocommerce. It did not work.
3. Even I changed the folder name wp-content. It did not work.
4. Installed classic editor. No help.
5. I did not contact godaddy for this issue. And I do not want to as their technical team did not able to resolve my webmail problem, which restricts me to send 1 email in 1 hour to external server.

Please help me.

The page I need help with: [log in to see the link]