May I know what specific information are you trying save or access in QuickBooks Online? If the error occurs after editing a customer information, then we have an ongoing issue about this. Our engineers are conducting further investigation on this unexpected behavior.

 

In the meantime, we’re requesting all users with the same issue […]

Resolution for 'company credentials issue: 'An unexpected error occurred while accessing or saving your data since yesterday. Can you solve this problems?' available: Yes.

The company credentials 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 company credentials issue yourself by looking for a resolution described in the article. If it is a complex company credentials issue or you are unable to solve the issue, you may contact us by clicking here or by using other company credentials support options.

For more information about resolving issues related to company credentials in Quickbooks/QBO or to get support for the issue 'An unexpected error occurred while accessing or saving your data since yesterday. Can you solve this problems?', click the link below: