Hi Anitha,
- For error "An error occurred while parsing EntityName"
Please re-check your activity's name, make sure you not use character "&". - For "adding the report from browse option the report library is empty"
In hyperlink target action, make sure you choose appropriate target "Microsoft Excel", and "Open specific report/input form/template" according in which folder you save the file in server.
Let me know if above suggestion solved your case.
Regards
Agus Eryanta