Can revit 2020 run 2019 dynamo script?

Hello all.
I am having a problem. I write a script in dynamo 2019 and it work ok. However, when using revit 2020, the message is:“Run completed with errors”. I am a new guy, thank for reading and pls send help.

Hi Than, could you post a screenshot showing the exact errors you are experiencing? If your script uses a lot of custom nodes, it is possible that it may not be compatible with Revit 2020 due to updates to the API.

Look at the Dynamo versions instead.
What are these in 2019 and 2020?