Kaizala trigger requires string but action provides object

[MGB42]

Hi,

I am building a simple flow which updates an Sharepoint list item when a Kaizala action is responded to. It is a custom action based on the attendance template and was working fine until this morning. The trigger itself is failing with the following error details:

The API 'kaizala' returned an invalid response for workflow operation 'When_someone_responds_to_a_custom_action' of type 'OpenApiConnectionWebhook'. Error details: 'The API operation 'ActionResponseOnGroup' requires the property 'body/answer8' to be of type 'String' but is of type 'Object'.'

body/answer8 is an object because it is a location and cannot be changed but I have no idea how to change the trigger?

I have tried rebuilding the flow from scratch but with the same error. 

Any help / direction would be much appreciated.

thanks

Mark