Zotero being crashed!!!
I didn't do anything, but it was crashed suddenly when I open it.
https://s3.amazonaws.com/zotero.org/images/forums/u12385588/roz9wkpin9gknga9xvty.png
https://s3.amazonaws.com/zotero.org/images/forums/u12385588/roz9wkpin9gknga9xvty.png
You can hold
Shift
at startup to enter the Troubleshooting Mode.Then disable all the plugins.
Then you can report to the developer of the plugin so that he can fix it.