Error Found in Custom UI XML

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You may see a custom UI runtime error similar to the following when you open PowerPoint.

This can happen when PowerPoint is configured to show interface errors. Here's how to fix it:

  1. Click OK to All to close the error message.
  2. Go to the File tab on the ribbon and click Options.
  3. Select the Advanced tab on the left side of the window that opens.
  4. Scroll down to the bottom of the Advanced options and uncheck the box to Show add-in user interface errors
  5. Click OK to close PowerPoint Options, then restart PowerPoint.