@gis, see if this helps.
Resolution for 'access company issue: 'Cant access company files in Pro 2016' available: Yes.
The access company 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 access company issue yourself by looking for a resolution described in the article. If it is a complex access company issue or you are unable to solve the issue, you may contact us by clicking here or by using other access company support options.
For more information about resolving issues related to access company in Quickbooks/QBO or to get support for the issue 'Cant access company files in Pro 2016', click the link below: