Last year, Céline Dion postponed her planned Courage Tour and revealed that she’s been diagnosed with Stiff Person Syndrome, a rare neurological disorder that affects about one person out of a million. Dion planned to return to the road with a series of European shows this summer and early next year, but her battle with that disorder has now forced her to cancel all of those shows.

The phrase “Stiff Person Syndrome” might look like a joke, but it’s not. The condition causes spasms that affect general functionality. Last year, Dion said, “Unfortunately, these spasms affect every aspect of my daily life, sometimes causing difficulties when I walk and not allowing me to use my vocal cords to sing the way I used to.” In a new statement, Dion says that she’s “working really hard to build back my strength” but that she’s not yet ready to perform again, though she still intends to return to the stage. Here’s her statement:

I’m so sorry to disappoint all of you once again. I’m working really hard to build back my strength, but touring can be very difficult even when you’re 100%. It’s not fair to you to keep postponing the shows, and even though it breaks my heart, it’s best that we cancel everything now until I’m really ready to be back on stage again. I want you all to know, I’m not giving up… and I can’t wait to see you again!