The IT unit in my office rolled out a new Windows update. Afterwards, the xlsm files are not running in my device. It says:
Excel cannot open the file “….xlsm” because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.
The macros are unblocked as well.
What could be the reason behind this, and how could this be resolved?
This issue also occurred in other devices in my organization. When the update was rolled back, the files could open again. Would it be possible to open it without rolling back the update?
