[14.0] Request has no attribute session

[jguenat]

Since 1305e87 was introduced, this error can be triggered when using /web for the website homepage and going to website domain when already logged in.

Maybe this issue can be triggered in another situation.

To Reproduce

Affected versions: 14.0

Steps to reproduce the behavior:

1. Install website
2. Configure the homepage_id url to /web
3. log in with an internal user on this website
4. try to open a new tab on the website
5. AttributeError is thrown

I patched it quickly there jguenat@36c5cf9

I tried to look for a better fix but it got complicated.