Why am I getting “Internal Server Error” running two Odoo instances (same domain but different ports)?

Question

I have two instances of Odoo in a server in the cloud. If I make the following steps I get \"Internal Server Error\":

1. I make login in the first instance (

Answer 1

If you have access to the sourcecode you can change this file like shown below and check if the issue is solved or not.

addons/web/controllers/main.py

if db != request.session.db:
     request.session.logout()
     request.session.db = db
     abort_and_redirect(request.httprequest.url)

And delete --> request.session.db = db

which is below this IF statement.