Outlook add-ins not loading

[Benzini00]

Hello everyone,

 

A bit of a weird one, I'm hoping one of you have come across this before because I'm drawing a blank.

 

We deploy a couple of add-ins for Outlook via the admin centre in Microsoft 365, 'FindTime' and 'Translate Message', we believe the add-in's were working fine before Christmas but now fail to load giving the following error: This add-in could not be started. Close this dialogue to ignore the problem or click "Restart" to try again.

 

 

When clicking 'Restart' the add-in gives the impression of attempting to load but nothing actually happens.

 

The strange thing is, the 'Insights' add-in loads without any issue.

 

 

I've trawled the web and followed all the troubleshooting steps I can find, such as, ensuring protected mode is enabled in IE11 settings, ensuring the Office desktop apps and the add-in's are up-to-date, but I can't seem to get the add-in's working or pinpoint the cause of the issue.

 

It feels a bit like a connection error or web rendering issue, we replaced Edge Legacy with Edge Chromium last summer but we're fairly certain the add-ins were still functioning after that change, and with the Insights add-in working I assume that rules out a rendering issue, unless of course the Insights add-in renders differently?

 

Here's what we're running: Windows 10 2004 / Office 13628.20528 (Microsoft 365 Apps for enterprise) / Edge Chromium 89.0.774.57 / Google Chrome 89.0.4389.90

 

Any suggestions or thoughts will be gratefully received.

 

Many thanks