Hi there. Sleep training never seems to end - does it? Kids!
I would try repeating an abbreviated version of her bedtime routine before her naps. Make sure she gets at least 20 minutes of wind down/ quiet time before napping. Kids like predictability and routine. Then why don't you or her father sleep in her room WITH her until she gets used to it, and then can sleep there on her own. Put a chair in there, or a cot, and see if that will help.
She might have a fit, and cry, but if you stick with a specific routine, over a week or so, it will work. It is harder to train older babies, so know that this will not work in a day or two.
I always think to myself when training my LO - I am the adult, she is the baby, and I am winning this battle. Sleep is non-negotiable! I could never do the CIO method, so I got creative in ways to help her sleep on her own.
I have often slept on the floor of my baby's room, patting her through the crib rails until she fell asleep! I found that letting her know I was there, but that we were not leaving her room until sleep was over, worked better than letting her cry. (she has the stamina of a triathlete, and I do not)!
Your little girl also might not sleep at all the first few days, so put her to bed early, and that should help too.
I sure hope this helps, and best of luck.