Hello all,

Having an issue on a site running version 7.7.2 relating to uploading pdfs. I have no issue uploading a new pdf to the media library but attempting to overwrite an existing item by uploading a new one results in

/umbraco/backoffice/UmbracoApi/Media/PostSave returning a 500 with the full error:

"Message":"An error has occurred.","ExceptionMessage":"Value cannot be null.\r\nParameter name: source","ExceptionType":"System.ArgumentNullException","StackTrace":" at System.Linq.Enumerable.Where[TSource](IEnumerable1 source, Func2 predicate)\r\n at Umbraco.Core.IO.MediaFileSystem.GetThumbnails(String path)\r\n at Umbraco.Core.IO.MediaFileSystem.DeleteThumbnails(String path)

and a console error:

DependencyHandler.ax…t&cdv=1102377012:68 TypeError: Cannot read property 'length' of undefined at Object.getAllProps (DependencyHandler.ax…dv=1102377012:19063) at Object.reBindChangedProperties (DependencyHandler.ax…dv=1102377012:19181)

Worth mentioning there is no other issues relating to media.

Of course a workaround would be to simply remove the media item entirely and upload the replacement however this isn't ideal as we have multiple pdfs that need replaced.

Any suggestions/ideas welcome