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Migration from Magento1 to Magento2 was done using the data migration tool successfully.

However, certain product pages end up throwing the exception as seen on the attached screenshot.

To isolate the issue, I did even disable the custom module created for data migration. enter image description here

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May be help you this...

This issue is XML file issue.

Your any custom module you missed White space.

This problem you got because the XML code, you copy directly on internet/webpage, there is some hidden character before start each line. This isn't space/ newline character. So, when push to Magento, Magento doesn't know this character, and it shows errors as your message. Solutions: clear all space between tag and order again.

And refer this link :-

Magento 2 : How to solve the message "Character content other than whitespace"?

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  • Hi Mohit, thanks, I have already tried this without any luck before posting here. – CodeForGood Mar 8 at 16:22
  • Turns out this was an issue with the custom module we had purchased, and was a result of an error in their di.xml file. – Mohit Patel Mar 8 at 16:30
  • I don't have any custom module yet on the new migrated site. So, I'm not sure where it is originating from. – CodeForGood Mar 8 at 16:32
  • you created xml file in custom module or custom theme – Mohit Patel Mar 8 at 16:36
  • you created today any xml files?? – Mohit Patel Mar 8 at 16:38
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The issue with the product page displaying the error above got clear when the cause was found to be something around attribute set migrated from Magento 1.9.2.2. I had to move custom_layout_update_file from from unassigned attributes on the right to the right group on the left. I attached the screenshots for your reference.

Once this is done, one can now view an option 'Custom Layout Update' under Migration_Design tab that you see on editing a product from the admin.

The value to choose from the Custom Layout Update drop down for the product that displays XML errors is 'No Update' and save it. enter image description here

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