Aggregaate error(Whitelabel Error Page)

Hello everyone,
I get error massage on my aggregate when am trying to open via browser which is
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Fri May 21 09:36:31 EAT 2021
There was an unexpected error (type=Not Found, status=404).
No message available
Does anyone has an idea on how to fix that because i was trying to fix this but