SQL Error ORA-00942 table or view does not exist

Question

I'm using SQL Developer, and after creating a user and creating a second connection with that account that has all the necessary credentials, I connected to my database as the system user.

But when I attempt to move forward, I encounter a SQL Error.

ORA-00942 table or view does not exist.:

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INSERT INTO customer (c_id,name,surname) VALUES ('1','Micheal','Jackson')

Can someone please help me with this?