Alternate page with proper canonical tag issue with http and https for home page

I've just finished a website for a client and submitted their site to Google Search Console. The client got an email saying there was a page indexing issue due to "Alternate page with proper canonical tag". When I went into GSC and looked at the URL inspection tool it says that https://www.bluelightcounselling.co.uk/home is not on Google. I've never come across this before. What should I do as we obviously want the https version as the main indexed page? Thanks in advance for any help.

Hello,

I'm having the exact same issue as Sammy_P. If anyone has any suggests on this, it would be appreciated.