A quick summary for people who are trying to help you:
You have a list-type property whose values are links. But the property is showing the “Type mismatch” error / “Tipo non corretto”. And when you click on the property values, their format changes.
It makes me wonder if your YAML format wasn’t right for Obsidian.
For example, this format works in Obsidian:
---
esempio:
- "[[a]]"
- "[[b]]"
- "[[c]]"
---
But this format gives a “Tipo non corretto” error.:
esempio: {'[[a]]', '[[b]]', '[[c]]'}
Does the first format above work in your vault?
Does your list property use that same format?
I don’t recall what the error was like in v1.8.10, and I don’t know what might have changed the format for you (maybe a plugin?, maybe an Obsidian update?), but checking the format might at least explain why you’re seeing the error.