Countries disappear from map.

Hello everyone!

I am having trouble with my Excel map, as some countries straight up do not show when entering data, as follows : 

I have tried rebooting the computer and using countries in other languages. It did work before, this issue only appeared recently. 

Has anyone else encountered this issue and/or know a fix? I have a hunch that it has something to do with the Internet, not my program. 

Thank you!