'Page with redirect' Google Console Error is causing my Adobe Portfolio site to not show in search

Hi,

I made my adobe portfolio website a while ago and have connected a custom domain in the past few weeks - rmsphoto.co.uk . When I linked the site, all seemed well and it came up as the 2nd result for rmsphoto, however, now it will not show in google search and the error 'Page with redirect' has appeared for rmsphoto.co.uk on Google Console. I do not think that I've changed anything for this change to happen. Also, rmsphoto.co.uk/myportfolio is not indexed because 'Duplicate, Google chose different canonical than user'. I have read the google suggestions to fix but cannot see what would be wrong with my page. any help is much appreciated. Thanks