lbain

This is what worked for me
https://www.ads-software.com/support/topic/order-received-endpoint-404-error-1

basically I checked each plugin one-by-one and flushed (saved) the permalinks in the correct settings EACH TIME. Then refreshed the 404 page after and it wound up being the last plugin on my list, been working on this for days, so happy to have it fixed.

The flushing (saving) of permalinks is a very important step, and has to be done for every change. A good lesson for the future.

the plugin that was an issue for me was WP Video (sorry deleted it so I don’t have the rest of the info for the plugin)

I had the same issue and after staying up 2 days and all night I figured it out. For me it was the WP Video Plugin, but according to WooCommerce there can be many plugins that cause a problem, so make sure to go through them all.

Steps
STEP 1) Have the page that has the 404 error open in a separate tab or window so you can switch back and forth from the page to the dashboard.

Note: My 404 pages are all the ones that changed from pages to endpoints “…/my-account/view-order/…”

STEP 2) FLUSH PERMALINKS
Go to settings > permalinks >
Choose:
Common Settings > post name
Product permalink base > shop base
Click Save

Note: if these are already your settings just click save. Product permalink base will change to “custom base” after you save, it’s ok as long as your base is “/shop” . Also I did this process many times but didn’t realize each change I needed to flush the permalinks, I would have saved myself 2 days of work and now another day to get all the stuff back that I lost…

STEP 3) Refresh the 404 page
If the page does not load and continues to be 404 then continue

STEP 4) Deactivate all plugins except woocommerce

Repeat steps 2 & 3

>If the page still reloads as 404 then it’s probably not a problem with a plugin.
>If the page loads as what it should be then go to step 5 to find the plugin that is causing an issue

STEP 5) Activate one plugin
STEP 6) Reload page that was 404 but now appears to be fixed

>if it becomes 404 again then that plug in was the issue and it would be best to delete it if possible – because you really don’t know if it will ever work with woocommerce again. – you will need to repeat step 2 and 3 – and your issue should be resolved.

>if it stays the correct page (doesn’t change back to 404) then that plugin was ok – in this case repeat steps 5&6 until you find the plugin that is the issue.

notes: mine was the last one on the page and I kept thinking it must be something else, so I tried other things after going about halfway through my long list of plugins. It would have been worth the time to go through each plug in, because I delete woocommerce and some other plugins in desperation, not realizing my issue was really that I didn’t find the problem plugin and then flush the permalinks. I didn’t lose my products or orders, but I did lose some other stuff I need to now reinstall and fix the info I lost within woocommerce, but at least it’s working and I don’t have to start over.

Hope this helps you