I haven't been following this, in fact, I haven't really heard about it.
However... Read the details of
ABC's retraction.....
"That source later clarified that during the campaign, Trump assigned Flynn and a small circle of other senior advisers to find ways to repair relations with Russia".
Trump assigned Flynn to reach out to his contacts to find ways to repair relations with Russia. Flynn had lots of contacts with Russia. A LOT of contacts with Russia.
So... The original reporting was most likely correct?