sending files from lightroom to photoshop quit working

today the open in photoshop as smart object layers from lightroom quit working as did the open in photoshop from lightroom for any file. Uninstalled / reinstalled without success. All apps are latest updates. Tried on a second computer ( both Macs with current OSX ). Same problem on both. Permissions on Macs for PS and LR checked. Happy to try any other suggestions.