Hello,

I'm a beginner with C5 and i'm facing a strange issue. Since i've tried to make a sorting by combining portfolio topics, blog entries topics and/or custom topics i have an error reported that blocks my sorting.
You can find a screenshot in the attached file "C5_Error".

I use several page list to sort others pages and i want to cross that with a topic list.
You can find a screenshot to help visualising in the screenshot file "Sorting2"

I've tried to go back to an older version but the error is still here and I cannot build my site anymore. (Does it mean it comes from the database?)
I've made some research on the internet and I don't find how fix it (knowing that i'm not a programmer at all :/ ).

Could you help me solving my problem?

Regards.