Steps to reproduce:
1.Open the editor for a page
2.Create a link
Observed Result:
There is no suggestion appearing for the link creation and also in the console the error 500 (Internal Server Error) appearing
Test Environment: http://en.wikipedia.beta.wmflabs.org/
Browser: Chrome Version 26.0.1410.65
OS: MAC OS X 10. 8. 5
Version: unspecified
Severity: normal