An injury has forced Tyla to cancel her upcoming world tour, which was set to kick off in Oslo on March 21. “Words cannot describe my frustration of this pivotal point in my career,” she wrote to her fans on Instagram. North American ticketholders will be automatically refunded; the ticket vendors will contact international ticketholders.

“For the past year I’ve been silently suffering with an injury that has tragically worsened,” she wrote in a message to her fans. “I’ve seen doctors and specialists with high hopes, but the pain has only become more agonizing as has the severity of the situation.” She did not specify the injury.

“I am absolutely heartbroken to have to say this but as of right now I won’t be able to proceed with the tour,” she wrote. “In consulting with medical professionals it’s become increasingly clear that continuing any festival or tour dates would jeopardize my long-term health and safety.”

She wrote that she hopes to be stage-ready again in the summer and that she and her team were “working diligently on a spectacular show.” The North American leg of her tour was to begin in San Francisco on April 22 and wrap in Minneapolis on May 28.

The South African–born singer broke through in the United States last year with “Water,” a Number Seven hit from her upcoming album, Tyla. She explained the song’s origins for Rolling Stone’s “The Breakdown” series. “With ‘Water,’ I just wanted a summer song that everybody could vibe to and have fun too,” she said. “The meaning of the song is frisky: It’s me letting a guy know, ‘Show me what you got to offer. I’m done with all the talk.’ Men will just talk and talk and talk.”

Her album is set to come out on March 22.