I can't open by Office Web Apps Excel file, SharePoint always prompt for user name and password and after entering correct user name and password it happens again and get error:
"An error has occurred trying to perform the requested action. Please try again."
Word and PowerPoint it works correct I'm able to open its by Office Web Apps without any problem.
I added Site to trust location in Internet Explorer but it also doesn't help.
Thanks for support and help, Best regards Andrzej