Reset your speaker https://support.sonos.com/en-ca/article/reset-your-sonos-product

After try to add your speaker. 
https://support.sonos.com/en-ca/article/add-a-new-product-to-an-existing-sonos-system

troubleshooting :

• wire speaker to your router
• use the desktop app if the speaker won’t update. 

You might need to repeat a few times as the new app is buggy AF and unreliable 

Thanks for responding! I've tried factory resetting several times and the same error code keeps appearing... I'm wondering is there any other way or tricks to getting this to setup on my wifi?

Wire your speaker to the router and use the desktop app. The mobile app is completely f’d up so good luck. 

Thank you for your suggestions and knowledge..