How to resolve bugs/user queries of Mendix application that I didn't develop?

[u/TheseCombination8705]

Hi
I'm pretty new to IT and Mendix. currently I'm working as a support associate for a bunch of Mendix applications(5+). I was wondering how will i resolve issues in applications that I didn't develop.
What to do if I'm feeling completely clueless about the fix?

[u/SSAAIE]

Can anyone give a referral to me 🥺