QB Issue Resolution:

Does the same error (QB shuts down) also happen if you edit the Admin User’s roles? If it does, then this could be a data problem issue. If not, I suggest to create a new user and try to edit the user’s roles. Observe if the same error would happen even to the new user.

Resolution for Issue 'Problems With QuickBooks 2015, I am trying to edit user’s roles. Every time that I try to edit one, QuickBooks shuts down.' available: Yes (Solved).
Source: Intuit Community forum.

Problems With QuickBooks 2015, I am trying to edit user’s roles. Every time that I try to edit one, QuickBooks shuts down.: this 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 issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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