Jenkins on AWS: No valid crumb was included in the request

Question

I have just set up Jenkins (v2.69) on an AWS EC2 instance and I am accessing it through a web browser (Chrome).

However, when reaching the 'Create First Admin User' page, when I click save and finish I am hit with the following issue.

And also receive this from the console:

Failed to load resource: the server responded with a status of 403 (No valid crumb was included in the request)

Is there something I am missing or have not set up?

I've been following this tutorial

user_9444132 · Answer

Follow the following steps to avoid the error:

change to Jenkins user by using the following command
```
su – Jenkins –s /bin/bash
```
go to the config.xml and comment out the crumbIssuer from /var/lib/Jenkins/config.xml:

comment out