I've had this problem several times recently, and I've made sure that the filenames do NOT contain spaces. This has typically been with .mp3 files with file size less than 5 Mb. As a consequence, I've either abandoned the attempts to post them or, in a few cases, have posted Dropbox links to the files in question. This has NOT been just a problem with file uploads from last night.
To participate in the discussions on Catholic church music, sign in or register as a forum member, The forum is a project of the Church Music Association of America.