Alex,
Sorry that you are seeing this issue.
Can you please answer some more queries to help us investigate further :
1) Can you please share your OS name and version details ?
I’m getting sometimes an error “This document cannot be displayed while offline. to go online uncheck work offline from file menu”
2) Can you please attach the screenshot of the issue to help us get a visual of it ?
3) Check the .log file which is located at <workspace dir>/.metadata/.log for any errors of interest. If any, please attach them. Also, please check the Tomcat server console for any error stack trace, If any, please attach them as well.