Tax Table not saving – part 2

This is a continuation of support topic https://www.ads-software.com/support/topic/tax-table-not-saving/#post-13434796.

The main issue is that when I create a row for a tax rate, the entire row disappears as soon as I save it.

I am starting this new topic because my issue was not resolved. drwpcom’s instructions, before she marked the topic resolved, were to start a new topic if I still needed help.

I cannot share the URL to the website I am developing as my client does not want their competition to know they are working on a new website.

Just a review of the last advice I received to try to resolve the problem were:

“I recommend you reinstall WooCommerce by FTP. Deactivate WooCommerce temporarily. Then you can download the zip file, unzip it and then overwrite the existing files on your server by FTP. Then activate WooCommerce and go to WooCommerce > Status > Tools to verify the database.”

I followed these steps, reactivated the Woocommerce plugin, and as before, the tax table disappeared as soon as I saved it.

I was busy with some other projects so I couldn’t get back to it before the topic was closed.

I’m hoping there is something else I can try.