Again, this is caused by a plugin. (Zotero doesn't have "View Groups".) Restart in Troubleshooting Mode (Help → "Restart in Troubleshooting Mode…”), which temporarily disables all plugins. Assuming that fixes it, you'll need to identify the plugin that's causing it and then report the problem to the plugin's developer.
I have already restarted in Troubleshooting Mode (Help → “Restart in Troubleshooting Mode…”), but the issue with the title not displaying still persists.
https://s3.amazonaws.com/zotero.org/images/forums/u17119475/idmstob6ajupm5uf5hxl.png
https://s3.amazonaws.com/zotero.org/images/forums/u17119475/px3of6jnjtdxwm2y2oyz.png