Alors ce que tu peux essayer , c'est de trouver où le fichier xlam se cache sur ton ordinateur et de le supprimer ou de le renommer.
Voilà ce que Léo la tête pensante du navigateur Brave m'a trouvé sur le sujet :
SaveAsAdobePDF.xlam on Mac
To remove the SaveAsAdobePDF.xlam file on a Mac, follow these steps:
Open the following folder: ~\Library\Group Containers\UBF8T346G9.Office\User Content\Startup\Excel and remove the SaveAsAdobePDF.xlam file from there.
Alternatively, you can also remove the file from the Adobe Acrobat installation directory: \Library\Application Support\Adobe\MACPDFM\MacPDFM.framework\Versions\A\MacPDFM.
After removing the file, restart Excel to ensure the changes take effect.
If you encounter issues with Excel not functioning properly after removing the file, you may need to disable the add-in through Excel's Add-ins menu:
Go to Tools > Excel Add-ins and uncheck the SaveAsAdobePDF add-in, then click Remove.
These steps should resolve the loading issue caused by the SaveAsAdobePDF.xlam file.