Is herbal supplement Serenity Restful Complex, mfg doTERRA, which contains lavender, l-theanine, lemon balm, passion flower and chamomile contraindicated to take along with HEPCVIR L?

I could not find them listed in Liverpool HEP Interactions
www.hep-druginteractions.org/checker

Hello beldemire,

This should be fine. The main issue with Sofosbuvir/Ledipasvir (which is what's in Harvoni and Hepcvir L) is that it needs stomach acidity for absorption so antacids and anti-acid medications should not be used (if at all possible).

Would I be right that you take the medication in the morning and the Serenity Restful Complex in the evening to help with sleep?

yes you are right

With a good separation between the two its unlikely to cause any issues then.