After changing any setting in Woocommerce plugin I get Error 404 Page not found for every page from menu (except main page)

Question

Hello I have Wordpress 6.4.2 and Woocommerce 8.4.0 and basically after any change in Woocommerce settings (for example just changing Settings->General->Thousand separator from , to ') and saving it leaded to Error 404 page not found for every page from menu (except main page).

Workaround was for me to always disable and re-enable Woocommerce plugin and then it luckily started to works always... But it was very annoying...

So what may be the reason for 404 error after any change?

Answer 1

So suspicion was that it started to happening after my colleague had a cleaning day and deleted unused german translation for Woocommerce pages for Shop, Basket, Checkout and My account.

There is useful menu Woocommerce->Status where it was in red that Polylang is missing translations for those pages. Since we are not using more languages now, I just disabled plugins:

• Polylang for WooCommerce | Version 1.7 | By WP SYNTEX
• Polylang Pro | Version 3.4.1 | By WP SYNTEX

And now it seems all works flawlessly.

(Also to be complete Woocommerce was missing also english link to "Terms and conditions" which I did add also. But I think it was not a main thing that fixed that error...)

Anyway maybe this tip will help, otherwise good luck hunting reasons for yours 404...