You can get the online study materials for UCEED by going to Learn section on DQ Edge and you can find the different topics like Mental Ability, Analytical Reasoning and others and under those you can find sub topics which is sufficient to crack the UCEED entrance exam.
There are two sections - Learn and Practice.
For both sections, you will have direct access to some free content. If you like that, then you can enroll for the full study material.
In case you are having a technical issue where you are not able to see the content, you can always report the same to the technical team and they will have it corrected.
Hope this helps