Alternate page with proper canonical tag for the index.html page

Dear,

In Google Saarch Console I see that my index.htm and /fr/index.html pages are not indexed because of an
"Alternate page with proper canonical tag"-error. Our domain is https;//www.automaticals.com/ and in the page settings of the Home page (index) I have put https;//www.automaticals.com/ as canonical. Is this correct or should this be https;//www.automaticals.com/index.html. Bur if I put https;//www.automaticals.com/index.html, what about out frensh index page? If I change the canonical on de /fr/index.html to https;//www.automaticals.com/fr/index.html it also changes the canonical on the original (dutch) site. How can I solve this issue so Google Search Console will index the pages again?

Thanks,
Herwig