We still can't replicate the problem, but after receiving some error logs we think it is worth trying the following:
1. Close all instances of Excel
2. Download the attached file (epf.tmp)
3. Rename this file to epf.cmd (Google does not allow .cmd files to be attached).
4. Run this file by double-clicking on it. This will delete the cached EPF cookies from your machine.
5. Launch Excel
Can somebody please try this and let us know if it fixes your issues?
Kind Regards,
Andy