[Plugin: Q2W3 Post Order] Not saving/ redirecting to 404

Hello, fjavier!

What do you mean “to add the first piece of code”?
This plugin is not adding code to pages.
May be you are talking about Code Insert Manager plugin?

No but it may be what I need… do you have the URL to that plugin handy?

https://www.ads-software.com/extend/plugins/q2w3-inc-manager/

You are right! is the ‘Code Insert Manager what I was originally referring to

Tell me more about your problem with Code Insert Manager.
What version of WordPress you are using?

After attempting to save a new insert it redirected me over to the 404 page not found, exactly as I originally posted, thanks.

Can you tell me what was the URL of that 404 page?

I’m sorry I cannot replicate anymore, has been updated?