Hi Nigel, thanks for your post! This is happening because of your rights in Sharepoint, and the installation request needs to be approved by the SharePoint administrators in your organization before you can install the app. With this in mind, I would recommend reaching out to your internal IT team so they can help you get that request approved.

For more information on how the Sharepoint admins can approve the request please read through this Manage App Requests article provided by Microsoft. Hope this helps!

Thanks, I’ve worked through that. But when I go to add a chart to my SHarepoint page, I get this error:

Thanks for sending that screenshot! When this issue was reported in the past, it was caused by some outdated default Sharepoint policy.

In that case, the solution required the following PowerShell action:

Connect-AzureAD

$sharePointOnlineServicePrincipal = Get-AzureADServicePrincipal -Filter "appId eq '00000003-0000-0ff1-ce00-000000000000'"

$sharePointOnlineServicePrincipal.ReplyUrls.Add("https://INSERT_YOUR_TENANT-appid.sharepoint.com/_forms/");

Set-AzureADServicePrincipal -ObjectId $sharePointOnlineServicePrincipal.ObjectId -ReplyUrls $sharePointOnlineServicePrincipal.ReplyUrls

Hope this helps!