Importing data into an Oracle table from a CSV file using SQL developer is terminating Connection - oracle

I'm having a weird issue with my SQL developer. I'm importing data into one of the existing table(with no data in it) in oracle database(DEV Environment) from a CSV file using import option in Oracle SQL developer. My connection gets terminated automatically as soon as I start the import with the error shown in the screenshot. After clicking "yes" task gets cancelled and import is rolled back. Finally, it is automatically resetting my database connection. To know the issue, I converted it to .txt file and also with using previous files which I was able to import successfully before and tried to import it again but having same issue.
Appreciate insights on this issue!

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ORA-39002 occurs during a Data Pump Import (IMPDP)

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Here are some links (note that an Excel import and a CSV import are nearly identical):
How to move csv file into oracle database using sql developer? [closed]
How to Import from Excel to a New Oracle Table with SQL Developer
How to Import from Excel to Oracle with SQL Developer

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