Goto Eq mount setup

Hi, is anyone using Bresser Messier Exos 2 EQ GoTo mount? I bought this mount and was using 3-star alignment as the alignment process. But post-alignment also, when I navigate to a star, it is in a gross error of 5-10 degrees. Most probably I am doing something wrong. It would be really helpful if someone could share his/her insight on what the issue could be and how I could debug this.
Thanks and Regards,
Arkadeep

Is it polar aligned? Check this link (Easy Polar Alignment for Astrophotography - [Step by Step]). You don’t need a polar scope, you can use any Stargazing app to find the north celestial pole.

Yes. I did a rough polar alignment using “PS Align Pro” app. After that, I had done the fine polar alignment with drift alignment method. Still when I was trying to go to some target in different part of the sky, it was grossly off. I was just wondering whether this is a common issue and whether there is an easy fix for this.

Can you mention what scope you are using?