Not quite.  Papadopoulos lied to the FBI about when his conversations with Russian actors occurred. His interactions occurred over a period of months while working for the Trump campaign. He originally told the FBI they happened earlier (before he joined the campaign).  The fact that these interactions occurred while he was part of the campaign is potentially highly material.  And lying is a real, very serious issue, because in doing so he frustrated the investigation (either knowingly or unwittingly).