Controversial rapper Lil Xan has cancelled a string of upcoming shows amid working on a tribute album for Mac Miller.

Lil Xan was due to play gigs on the Monster Energy Outbreak Tour throughout November in cities Ft. Lauderdale, Denver, Salt Lake City, Phoenix, Las Vegas, San Diego, and Tampa. While the rapper did not comment on the cancellations, venues and ticketing sites posted that the event is cancelled “due to exhaustion.”

Denver’s concert at Summit posted the following notice:

According to TMZ, sources close to Lil Xan said the cancellations came in light of the musician working on a new tribute album to the late rapper Mac Miller. The source said Lil Xan has been working non-stop on the LP, dubbed Be Safe, and feels burnt out.

Fans took to Twitter to express their confusion and anger.

TFL and ATBS for ticketing professionals

Phem, who was due to open for Lil Xan on the tour, said that she is “so sorry” and “if it was up to me it wouldn’t be cancelled.”

“I had no control in the situation and would’ve played every show,” she said to fans in a tweet. “I understand your frustration.”

Lil Xan is reportedly working on rescheduling the cancelled shows but nothing has been announced yet.