Invalid request! No data was saved.

[nurlan1992]

Help me pls 

I cant even log in in web interface. im receiving an error "Invalid request! No data was saved.". i dont know reasons of this error message. its unknown message driving me crazy  .

roundcube installed on Centos 6.8 and nginx + PHP-FPM.

php 5.6

[rm13]

Have you enabled the debug logs and checked them?

You may also want to look at the web server logs.