Unable to sync with server. A request is failing that makes the application unusable. Please contact technical support.

I have two server named as RND and development server.  I have backup of development server i.e code and database. That i have uploaded(both code and database) into RND server.

After that RND server shows login screen but when i try to login it shows

Unable to sync with server. A request is failing that makes the application unusable. Please contact technical support.

Now on development server its shows same error.

I have checked log file. log file is empty.

Please help me.

Thanks.