Hi Loizos,
Thanks for using Microsoft products and posting in the community, I'm glad to offer help.
According to the error message, you can try to right click the object > select "Package Shell Object" > Properties > change the "Open with" application in the property pane.
If that doesn't work, could you please provide a screenshot of your Product Information? It would be helpful for us to check whether it is a certain issue, as shown below, please note to mask your email address.
Hope the above suggestion can be helpful, please feel free to let me know if there is any progress, I'll continue to help you.
Best Regards,
Arck