The error message says that Microsoft Excel cannot open the selected file in Protected View. Therefore, if you disable the Protected View in Trust Center settings, the error may get fixed.

After that, make sure that the Open selected file types in Protected View option is selected. If so, tick all the Open checkboxes that are related to the old version of Excel. For example, you ...

Microsoft's Protected View feature tries to protect you against potentially malicious files and documents. Here's how to use it.

Microsoft Office 2010 includes a new "Protected View" that, by default, will open all Outlook attachments and documents downloaded from the Internet in "read-only" mode.