Failed to verify signature of signed JSON object

I’m trying to create a perspective that will show information from ServiceNow via the WebAPI tiles. It’s failing on an object that I’ve brought in to SCOM via the Community Solarwinds management pack. The class is ‘Node-Other Device’. The error I get is:

“Failed to select fields from a signed JSON request. This endpoint only accepts requests which have been authenticated (signed) by the server”

and this appears as soon as I choose the WebAPI tile, regardless of which provider I choose. I can create dashboards or perspectives with WebAPI tiles on other objects, but not on nodes from Solarwinds.

In the rolling log I can see ‘Failed to verify signature of signed JSON object’ - is there a workaround to ignore this?