Sql query is failing in Oracle DB

Question

I run below query to fetch data from a Oracle DB -

SELECT T1.Col1, T2.Col1 AS Tab2_Col1 
    FROM Tab1 AS T1  
        INNER JOIN Tab2 AS T2         
        ON Tab1.Col3 = Tab2.Col4

With that, I am getting below error -

ORA-00933: SQL command not properly ended
00933. 00000 -  "SQL command not properly ended"
*Cause:    
*Action:
Error at Line: 2 Column: 32

Can someone help me to understand why my query is failing?

Thanks for your time