Prestashop 1.6: “Unexpected token <” error when upload category thumbnail

prestashopRecently i tried to upgrade a Prestashop system from version 1.5 to 1.6. The upgrade scripts shows no error, but when i go there are some hiccups at the backend. When i tried to upload thumbnail for my category, the upload failed. And it show the error message “Unexpected token <“. After some testing and debugging still the same, at the end i tried to reset the Category module and it magically solve the problem!

prestashop category thumbnail upload error, unexpected  token

To solve “Unexpected token <” error when upload category thumbnail in prestashop 1.6, follow the steps below:-


  • Login to prestashop backend
  • Go to Module -> look for Category Block
  • Click on “Reset”
  • Now you can try to upload your thumbnail again, it should be fine now 🙂

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One Response to “Prestashop 1.6: “Unexpected token <” error when upload category thumbnail”

  1. mathias says:


    Thank you for your help 🙂

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