Requests to the server have been blocked nextcloud email app

I’m unable to open emails under https but it does open just fine under http, I’d prefer it to open in https as its more secure and a norm. It shows me a sad face and when hoover my mouse over it and says “requests to the server have been blocked”.
My Nextcloud version is 14.0.3 and running along OnlyOffice on Docker, would appreciate any suggestion or solution to this problem.


Sorted by removing default email app and installing rainloop webmail. Cheers.