[500 error when I clear cache]

In the performance tab at the top I click the clear cache and I received a 500 error and my site is down.

I did because I have a product which I duplicated and when I changed the information in the products it did not up date so I thought it was a cache issue installed cache module get this message:

Unable to retrieve OPCache status

It looks like you do not have OPCache running on your server or one of the following functions has been disabled:

• opcache_reset
• opcache_invalidate
• opcache_get_configuration
• opcache_get_status

That is when I decide to click the cache at the top of the page in preformance. and idea what I should do?

Thanks Ron

[Recommended Amazon sync/seller modules]

HI I am thinking of this module has anyone tried this for the thirty bees?  https://store.thirtybees.com/shop-modules/administration/module-amazon-sync?search_query=amazon&results=2

I think this is from the thirty bees market place but when I tried to send them an email I received a 404 error so If it is ok to use is it ok to buy there?

Thank  you,

Ron

[paid shipping is showing free shipping]

Thank you all for the help it is working just fine.  I sometimes just don't understand the direction the cart give. But you clarified it great and again thanks! Ron

[paid shipping is showing free shipping]

Hello I am new using this cart and it is much better than the magento 2.3.3 which sent me crazy. But I am not able to figure this shipping out I Have been trying for a couple of days now switching trying different combination etc.  I have weight set up in my carts and free shipping after $50.00 I am currently only using USPS. Here is my shipping set-up.

I certainly would appreciate any help I can get on this shipping, Thank you, Ron