I typically delete existing logs, then reproduce the issue, then collect the logs and note the date and timestamp the issue occurred.

The log configuration file should be located here:
[LeanFT installation folder]\dat\LogConfigurations\leanft.runtime.log.config.sample.json

You need to change "info" to "trace" on the configurations for the logs.

The log output should be created here:
%localappdata%LeanFTLogsleanft.runtime.log

Refer to the below image to collect the logs for your specific IDE as well.