I work on a iMac (OS X Yosemite) in Lightroom CC and try to publish a large book to Blurb. Halfway the upload, I get this "internal error" message : "?:0 attempt to index a nil value". All I can do is cancel the upload as nothing moves anymore.. any solution to publish my book ?
I am running Lightroom Classic CC and was attempting to export 200 photographs to SMug MUG when I got this error. "An internal error has occurred: ?:0: attempt to index a nul value. I am running on Windows 10 with ALL updates applied. I have had this several times in past. Not sure of exact steps to create but will note them in future.