Problem loading gmail tracking pixel

The e-mails I am sending are not being tracked on gmail.



I am using sparkpost as email delivery service.

Code:
Failed to load resource: the server responded with a status of 404 () https://ci4.googleusercontent.com/proxy/GQWGns_xUfU2tpSLvJmv1un4AwPcglP6pn2ju0gks5QKvhM7H_8Wo07BGLnKtjHozoRQFGy2Loj-he0hA3ref_OyQdIzYYECmA=s0-d-e1-ft#https://mautic.forky.com.br/email/5877e79a53f4f.gif

But in case I go straight to the link: https://mautic.forky.com.br/email/5877e79a53f4f.gif on my browser, it works.

Any idea on what should I do?

The e-mails I am sending are not being tracked on gmail.

I am using sparkpost as email delivery service.

Failed to load resource: the server responded with a status of 404 ()
https://ci4.googleusercontent.com/proxy/GQWGns_xUfU2tpSLvJmv1un4AwPcglP6pn2ju0gks5QKvhM7H_8Wo07BGLnKtjHozoRQFGy2Loj-he0hA3ref_OyQdIzYYECmA=s0-d-e1-ft#https://mautic.forky.com.br/email/5877e79a53f4f.gif

But in case I go straight to the link: https://mautic.forky.com.br/email/5877e79a53f4f.gif on my browser, it works.

Any idea on what should I do?

If you try to access https://mautic.forky.com.br or https://mautic.forky.com.br/email/5877e79a53f4f.gif it says the website is down?

Interesting @MxyzptlkFishStix
Thanks for pointing that out.
I can access the page WHEN I am logged in to mautic, but the error appears when I am in a private browser window.

This is the error from mautic logs:

[2017-01-12 22:11:49] mautic.ERROR: Error: Call to a member function getId() on null - in file /opt/bitnami/apps/mautic/htdocs/app/bundles/EmailBundle/Helper/PointEventHelper.php - at line 30

Checking the file on github, this is where the error is showing:
https://github.com/mautic/mautic/blob/staging/app/bundles/EmailBundle/Helper/PointEventHelper.php#L30

It looks like it was a problem with my points trigger that would give points to any opened email. Not sure if it is a bug or something related to my install.

THank you SO much for your help anyway @MxyzptlkFishStix !