uploads//images/teaser/2020Tokyo.jpg isn't a valid image

  FILE: /homepages/38/d18242101/htdocs/3art-v2020/public/imgresize.php
  LINE: 12

    FILE: /homepages/38/d18242101/htdocs/3art-v2020/cm-system/class/imageTransform/imageTransform.php
    LINE: 236

      FILE: /homepages/38/d18242101/htdocs/3art-v2020/cm-system/class/imageResizeController.class.php
      LINE: 39