Error generating thumbnail

Error creating thumbnail: convert: incorrect data check `/tmp/localcopy_2ec092b85927-1.png' @ error/png.c/MagickPNGErrorHandler/1309.
convert: corrupt image `/tmp/localcopy_2ec092b85927-1.png' @ error/png.c/ReadPNGImage/3294.
convert: missing an image filename `/tmp/transform_59ce8293581c-1.png' @ error/convert.c/ConvertImageCommand/3011.

Re-exporting with GIMP was enough.

Version: unspecified
Severity: normal
URL: https://upload.wikimedia.org/wikipedia/commons/thumb/archive/1/12/20121025112208!Localitzaci%C3%B3_de_Tavernes_de_la_Valldigna_respecte_del_Pa%C3%ADs_Valenci%C3%A0.png/71px-Localitzaci%C3%B3_de_Tavernes_de_la_Valldigna_respecte_del_Pa%C3%ADs_Valenci%C3%A0.png