Here's the full documentation for that feature: https://world.episerver.com/documentation/developer-guides/CMS/add-ons/Installing-add-ons/

Your specific error looks like it's missing the section declaration near the top of web.config within <configSections>.

Also, you might be missing a couple of other steps, like this one:

If installationMode was set to UI, run the cmdlet "Convert-EPiAddons" in the Package Manager Console. 

Start by following the steps in documentation first. I haven't done UI-based add-on installation in a long time, so not sure if something else was missed.

Hi!

Thanks for your reply. Setting the installationMode to UI is the first step according to that documentation, which is why I could not go further with this issue. Also, I have not had any new addons installed since this is a fresh project so I don't think the Convert-EPiAddons thing applies to my situation.

I believe you're right in that the <configSections> section is missing something for episerver.packaging. Unfortunately, this is not detailed in the documentation and so I am not exactly sure what to put in the type field for the section. Could you please help me here?

Hey so I managed to find a web.config from github that had what I needed (https://github.com/episerver/AlloyDemoKit/blob/master/src/AlloyDemoKit/Web.config)

<section name="episerver.packaging" type="EPiServer.Packaging.Configuration.EPiServerPackagingSection, EPiServer.Packaging" />

I have a new issue now though. The button still does not appear in the dashboard of options

I've added the only user in the website to these groups:

I had to manually create PackagingAdmins if that makes any difference.

Any ideas from here?

Kind regards,

Dore