Yeah I agree with Iv4dogs. Start all over again as if she was a puppy. The treats also seem to be distracting her from doing what she’s suppose to, so replacing them with verbal praise is probably a good idea.
Also when you take her out, don’t walk around with her. Just stay put in one place and I’m sure sooner or later she’ll get bored enough to do her business. Then, praise her to the skies as if she’d just invented a cure for cancer!..
Next time go to the same spot and wait wait wait until she does what she’s suppose to and then PRAISE PRAISE PRAISE.

Good luck.

-Varga