Sign in doesn't work - takes to page not found '_error' does not exist.

[campbellgoe]

Describe the bug
Sign in / auth doesn't work for neither google nor email sign up/in.

To Reproduce
Deploying to AWS EC2 ubuntu 18-04 instance:
Populate the .env file with real data such as
SERVER_URL=http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/
...
GOOGLE_ID
GOOGLE_SECRET=
...

Expected behavior
Redirect user to either previous page or logged in page, and show that the user is signed in. Instead it takes user to Page not found '_error' does not exist, and console error with replaceState cannot be executed on the origin.

Node version, NPM version and Operating System and version
nodejs v12.16.1
npm version 6.13.4
Operating system:
Ubuntu 18.04

Additional context

Logs:

Failed to load resource: the server responded with a status of 404 (Not Found)
main-e42bb1aba7f66664c61d.js:1 Failed to execute 'replaceState' on 'History': A history state object with URL 'http://auth/email/signin/4337b7cf-4aa0-4a5a-85ca-8280890e38e3' cannot be created in a document with origin 'http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com' and URL 'http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com//auth/email/signin/4337b7cf-4aa0-4a5a-85ca-8280890e38e3'.
Error: Failed to execute 'replaceState' on 'History': A history state object with URL 'http://auth/email/signin/4337b7cf-4aa0-4a5a-85ca-8280890e38e3' cannot be created in a document with origin 'http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com' and URL 'http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com//auth/email/signin/4337b7cf-4aa0-4a5a-85ca-8280890e38e3'.
at e.value (http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/_next/static/chunks/commons.913a7d85cefec260cf27.js:72:11510)
at new e (http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/_next/static/chunks/commons.913a7d85cefec260cf27.js:72:8219)
at i (http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/_next/static/chunks/commons.913a7d85cefec260cf27.js:72:5262)
at t.createRouter (http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/_next/static/chunks/commons.913a7d85cefec260cf27.js:18:6669)
at http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/_next/static/runtime/main-e42bb1aba7f66664c61d.js:1:1938
at w (http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/_next/static/chunks/commons.913a7d85cefec260cf27.js:48:55892)
at Generator._invoke (http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/_next/static/chunks/commons.913a7d85cefec260cf27.js:48:55680)
at Generator.e. [as next] (http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/_next/static/chunks/commons.913a7d85cefec260cf27.js:48:56071)
at r (http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/_next/static/chunks/commons.913a7d85cefec260cf27.js:18:8454)
at l (http://ec2-3-10-198-176.eu-west-2.compute.amazonaws.com/_next/static/chunks/commons.913a7d85cefec260cf27.js:18:8652)