The error message including "Catastrophic failure" in Excel typically indicates a severe problem with Excel itself, an add-in, or a component of the Windows operating system that Excel relies upon. This error can be caused by various issues ranging from corrupt files, conflicts with other software, issues in the Windows Registry, or problems with specific Excel add-ins or features. Here are some solutions at EdOps:
1. Typically means that the file you are working on has been corrupted and needs to be repaired in Excel. Follow the steps in this article: Excel Keeps Crashing When I Open or Macros No Longer Work in THIS FILE, aka How To Repair a Corrupted Excel workbook
2. Try a restart
3. We may need to have DNS remove and reinstall the Microsoft Office Suite