You can hide a category in WooCommerce so the users can’t see it or have access to directly.
Here are some free resources available:
Category: WooCommerce
How to redirect to a quote request page after adding to quote
How do I change the title of “”Request For Quote” at WooCommerce checkout?
Navigate to WooCommerce->settings->payments and select Quote Request
Select Quote Request:
How to use the Inquiry Widget with NP Quote Request for WooCommerce
Checkout the video to see how to setup a cart widget for the quote requests.
How to turn on debugging and log the messages in WordPress
You can enable WordPress debug without displaying the messages publicly to the site visitors.
You can enable WordPress debug in WordPress by adding:
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define( 'WP_DEBUG_DISPLAY', false );
ini_set('error_reporting', E_ALL);
to the wp-config.php file.
WordPress debug messages are logged without displaying to your site visitors. After the issue is resolved, you can turn debugging off by chaninging the line define(‘WP_DEBUG’, true) to define(‘WP_DEBUG’, false);
You can find wp-config.php in your WordPress directory and copy and paste the 3 lines above in that file.
Please make sure none of the lines above are repeated in the file.
You can then find the debug.log file in the WordPress wp-content directory.
How to make the NP Quote Plugin work with page caching plugins
Depending on your caching plugin you need to exclude dynamic pages and sometimes exclude cookies from cache. The pages to exclude are the quote request, product category (archive), shop and the product page. The most common problem caused by page caching is that items which are added to the quote cart cannot be found afterwards.
WP Rocket:
/wp-admin/options-general.php?page=wprocket#advanced_cache
Never Cache URL(s)
/quote-request/(.*)
/product-category/(.*)
/shop/(.*)
/product/(.*)
Never Cache Cookies
rfqtk_wp_session_
WP Optimize: 
If are using Pantheon:
You could also change the session method to PHP Sessions as an alternative method. 
Do I need to download/reinstall the plugin after purchasing the plus version
The NP Quote Request WooCommerce Plus is an extension that you install in addition to the free version to provides a lot more options and features.
After purchasing and downloading the Plus file (RFQTK.zip) to your computer , you can install by:
1: Navigate to the plugins page in your admin area.
2: Click add new on the top of page.
3: Click on upload plugin
4: Click on choose file
5: Browse to where you stored rfqtk.zip and select the rfqtk.zip. click open.
6. Click install now and then activate.
7: after activating the plugin you will see a notification
Click on the “Click Here” and the license key and the email you used to purchase.
