**Problem:**
A user might be logged out after the Bridge was loaded. We want to give them the option to save their edit anyway under an IP.
**Screenshots/mockups:**
Desktop
{F31692028}
Mobile
{F31692031}
Please find final design specs in [[ https://www.figma.com/file/KIkcQ7NjOl8OkQtGWe5duIbW/Wikidata-Bridge?node-id=3638%3A1871 | this Figma artboard ]].
**BDD**
GIVEN a Bridge edit
AND the user gets logged out after the Bridge has been loaded
WHEN Trying to save the edit
THEN the user is presented with an error screen
AND is given the option to save their edit anonymously
**Acceptance criteria:**
[ ] error message is shown when assertuser fails
[ ] second save is performed without assertuser
**Notes:**
* This is only supposed to happen if the first assertuser ended up saying that the user was actually logged out as opposed to having logged in under a different account.
* The desktop version shows a "Go back" link that takes users back to the editor. In the mobile version, that go back action can be performed by using the back navigation button in the header