Fixing 500 Error on Wordpress random pages

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Project Description

Have a Wordpress / Woocommerce site about 800 products.

Sometimes client browsing the site they get Error 500 randomly. On the Error log I am getting the error below:

PHP Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in /home/furnishplus/public_html/wp-content/themes/furnish/woocommerce/single-product/tabs/[url removed, login to view] on line 81client

Not sure if the Error 500 is causing because of the error above or not.

Or maybe fix the HTTPS in hatches file.

Please let me know if you had this ecperice before and fixed it.

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