“She wouldn’t meet with them,” says the source.

“They called LA Reid as a last resort and were like, ‘We need a mediator.’

She didn’t show up to meetings or mediator meetings even after LA Reid was involved.

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Reid was last resort.

She wouldn’t sit down with the group for group therapy.”

(Reid’s rep did not respond to EW’s request for comment.)

And more recently she spoke with them on an individual basis."

“[Cabello’s] solo career is not the issue,” says the first source.

“The issue is how she handled herself over the past year.

The secrecy and not knowing what’s coming, that’s the issue.

They needed to map out a plan [for 2017] and she wasn’t having it.”