Warning/404 for non existent pages

[pgleeson]

Rather than showing a (partially) blank page e.g.
https://v2.opensourcebrain.org/jfhjgj -> should be 404
https://v2.opensourcebrain.org/workspace -> should be 404
https://v2.opensourcebrain.org/workspace/1abcd -> should be: You do not have access to a workspace with that ID
https://v2.opensourcebrain.org/user/pglee -> should be no such user

[D-GopalKrishna]

What is better?

• a 404 page or
• a snackbar with a message - alerting

cc @filippomc

[sanjayankur31]

Let's do a page, that seems cleaner?

[filippomc]

Before the restyling, it used to be there a blank error page with a modal in the middle about the error (401, 404, or whathever else) and a button to go the homepage. I'd go for that as a catch all for any kind of issue to avoid the design of a new page. @sanjayankur31 @pgleeson what do you think?

[sanjayankur31]

Yeh, I think that sounds good.

[filippomc]

Two things to configure:

• error boundary
• non existing pages route

[SimaoBolota-MetaCell]

I am still getting blank pages for the following @D-GopalKrishna @filippomc

• https://v2dev.opensourcebrain.org/ahshfh where I was expecting a 404 to be displayed
  

• https://v2dev.opensourcebrain.org/workspace where I was expecting a 404 to be displayed
  

• https://v2dev.opensourcebrain.org/workspace/akjdhasj got a 404 but it is not displayed to the user
  

• https://v2dev.opensourcebrain.org/workspace/224 got a 401 for non authorized but it is not displayed to the user
  

• https://v2dev.opensourcebrain.org/user/pglee got a 404 not found but it is not displayed to the user