Flickr said it appears to be an Adobe Lightroom issue and they may have changed to only allow Lightroom CC.
Nonsense. Utterly false.
The problem is probably at Flickr's end, not Lightroom. But beyond that I don't really know what to advise you except to wait for a day and try it again.
By the way, please state the exact version NUMBER of your operating system.
It’s more likely that Flickr changed its API that Lightroom uses to communicate with it. That could mean that Lightroom needs an update, but Lightroom 5 will not receive any updates anymore.
To build on the previous replies, Flickr changed its end of the service quite a while ago in a way that was incompatible with LR 5 and earlier versions. Once a new major version is released, Adobe stops providing updates to the previous major version.
Your options are:
- Upgrade to a LR 7 subscription.
- Get this third-party Flickr plugin. The author supports it much better than Adobe supports the built-in plugin. However, it will take some effort to get your old published collections into the new plugin. (This only matters if you want to change those old collections -- otherwise you can just leave them unmolested.)
- Download a more recent version of Adobe's Flickr plugin, as described here: Flickr: The Help Forum: [investigating] It's back. Flickr Upload Via Lightroom not working, semicolon expected . You have to read carefully through that thread for where to download it and how to install it. But it's been over two years with no recent reports (at least in that thread) of this solution continuing to work.