hi. after posting a topic, im having this error

and for reply, i have this error

when i try to view my message, it show me this
"
Invalid Page URL. If this is an error and the page should exist, please contact the system administrator and tell them how you got this message.
"
and seem like many error i have yet to discover. is there a way i can restore the default without affecting my user and topic in my forums?
and for reply, i have this error
when i try to view my message, it show me this
"
Invalid Page URL. If this is an error and the page should exist, please contact the system administrator and tell them how you got this message.
"
and seem like many error i have yet to discover. is there a way i can restore the default without affecting my user and topic in my forums?
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