Navigation not possible

Dear All,

I am facing OBN Issue in Portal. When i am creating travel request in ESS , After entering all the details , When i am clicking on "Display Request Form"

button  before submitting i am facing "navigation not possible " error.

We are using portal 7.31 and ECC 6.0 ehp7

Please find attached screenshot of error.

Please help me  to resolve this issue.

Thanks in Advance,

Regards,

Raghu