Www. not working while http// and https// is working

Hi there my site keeps getting error when i try login the website with www.marketinginstitute.com

but it works fine with https://marketinginstitute.com/ and http://marketinginstitute.com/

but when www. is added like https://www.marketinginstitute.com/ or http://www.marketinginstitute.com/ an error happen

Is there something in cloudflare setting i should fix or amend

As both are added in DNS


Seeking your assistance

Thanks

2 posts were merged into an existing topic: Www not working only https:// or http://