TOPIC: Empty Popup while doing test connection

Hello,

I am trying to connect to Oracle Database Connection Type by giving correct tns name and correct credential, i am not able to connect to the database.
when i am trying to do test connection an empty error popup comes with no message and also no message in execution log window as well. how do i check what is the error while making the connection.

Screenshot attached for the config.

Any help is appreciated.

Database browser is a 32-bit application.
Have you got 32-bit oracle client installed?

Yes, it must have been installed earlier because i was able to use it before since this week, i am facing this issue.
but still i have downloaded Oracle Instant Client basic package 12.2.0.1.0 from Oracle Instant Client website but still the same.
Screenshots for Instant client attached.

I used this a connection string and I was able to connect

localhost:1521:sn=orcl

this one might work as well

host:1521/instance