New to me, but see this:

https://quickbooks.intuit.com/accounting/advanced/

Resolution for 'being phased issue: 'Hi. I saw a post on Facebook that a new subscription level of online is being phased in. What do you know about it? Thanks!' available: Yes.

The being phased issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the being phased issue yourself by looking for a resolution described in the article. If it is a complex being phased issue or you are unable to solve the issue, you may contact us by clicking here or by using other being phased support options.

For more information about resolving issues related to being phased in Quickbooks/QBO or to get support for the issue 'Hi. I saw a post on Facebook that a new subscription level of online is being phased in. What do you know about it? Thanks!', click the link below: