Unable to upgrade addon from dashboard - 500 Internal Server error

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I am attempting to upgrade the ecom tools addon from 1.03 to 1.05 in the dashboard of our site. Although I think the specific addon is not relevant here as I have updated several other addons in the past, and thus I think our site is working correctly.

The issue occurs when I click the Update Addons button in the dashboard, I get an error message of:

Fatal error: Call to a member function getRemoteURL() on a non-object in /srv/www/htdocs/updates/concrete5.4.1.1/concrete/single_pages/dashboard/install.php on line 222

I have tried this on both our dev and production installations with the same result. To troubleshoot this I took a packet trace and when I did that I see that the site makes a request for the package and then the C5 marketplace server returns a "500 Internal Server Error"

Based on this I am thinking there is an issue with the C5 marketplace server. Would someone on the C5 team take a look and see if there is an issue?

If it is something on our end I would like to see if anyone know what I need to change to make this work.

nikkor