Collection error

Backlight 4, 5 & 6 Support
#1

I’m getting this error when publishing a new collection from Lightroom. I’m using Backlight 4 and haven’t changed anything. Thanks.
image

#2

Are you using the latest version of Publisher?

#3

I’m on 6.0.0, but here’s a screenshot of what I’m currently on.

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image1135×798 20 KB

#4

First thing to try is updating everything, including the Publisher plugin (6.0.3)