Error message I've not seen before

[IanIreland]

I was checking my HS log and spotted this;
03/09/2020 14:48:01
Legacy-Plugin
Blue-Iris Error
Error updating camera device(Key:116 Value:Cam1): The given key was not present in the dictionary.

I have no idea what it means.

Any suggestions?

[IanIreland]

Another error today;

Login Error: Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'HSPI_BI.BlueIris+JSystemData' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly. To fix this error either change the JSON to a JSON object (e.g. {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array. Path 'data', line 1, position 73.