Uploading Native MXF files no more allowed?

tomyt 12 Nov 2016 20:52
Hello all,
after uploading successfully 3 UHD mxf-files a few days ago, on 6th of November, today I experience that the files are beeing rejected from the system with "Error - file format not allowed".
Someone experienced this? Is the mxf-container no more allowed since the last days?