I'm running Outlook 2016 (16.0.4738.1000, 32bit) and have installed the latest OnePlaceMail Lite (7.9.0). (We're looking to replace our in-house email filing solution with a SharePoint/OPM solution.)

Having configured the relevant URLs neither the Search button nor any of the Launch actions do anything but open the top-level folder labelled "-Favorites-" in the OnePlaceMail data file, with an empty items list and reading pane.

When choosing locations from the "-Favorites-" list I get the same result.

I've used the express and full versions of OPM in a previous job and, if I remember correctly, these are all supposed to open in a browser window within Outlook.

FYI my HKCU EnableRoamingFolderHomepages registry key is set to 1 as I have a folder in my primary data file that points to an internal group calendar site.

The following is logged when clicking "Search" or choosing an entry from the "Launch" dropdown:
2019-04-16 15:42:21:656,636910261416564457,4,1,"Outlook","StartMethod-GetRootSharepointFolder"
2019-04-16 15:42:21:671,636910261416717877,4,1,"Outlook","StartCodeLoop-GetRootSharepointFolder - Find Root Folder in Outlook"
2019-04-16 15:42:21:673,636910261416737876,4,1,"Outlook","EndCodeLoop-GetRootSharepointFolder - Find Root Folder in Outlook"
2019-04-16 15:42:21:674,636910261416747857,4,1,"Outlook","EndMethod-GetRootSharepointFolder"

Also, the following is logged when clicking the "Launch" button to open the dropdown, which seems odd as I don't have OnePlaceDocs installed:
2019-04-16 15:46:07:911,636910263679111605,4,1,"Outlook","ErrorOccurred-Error reading registry key-Object reference not set to an instance of an object.- at Scinaptic.OnePlaceMail.API.Core.ProductInfoBase.GetRegistryKeyValue(String regKeyName, String regKeyValueName)"
2019-04-16 15:46:07:915,636910263679151667,4,1,"Outlook","DataOutput-regKeyName=SOFTWARE\OnePlace Solutions\OnePlaceDocs"
2019-04-16 15:46:07:918,636910263679181597,4,1,"Outlook","Data_Output-regKeyValueName=productVersion"

I've tried re-installing and properly cleaning up the data file, registry keys, app data, etc., between installs, but it makes no difference. I've also disabled all other add-ins to be sure.

Any suggestions?