Incorrect blog and event URL should show 404 page.

[aadilkhalifa]

Currently, blog and event pages that do not exist are not handled properly. Ideally, these need to show 404 page.
Eg.
https://cosh.nitk.ac.in/events/abc
https://cosh.nitk.ac.in/blog/abc

[ShahnawazHussain28]

Please assign this issue to me. Let me fix this issue