Apple could not verify “jansi-2.4.0-812780dc2175eccf-libjansi.jnilib” is free of malware that may harm your Mac or compromise your privacy.
When I move the library to the trash, it creates a new version of the library, and the error persists.
If you want to use sourcetree you can't move this to trash and expect the app to work.
You can bypass the check for this library, directions are here from Apple:
How to fix the "Apple could not verify this app" warning
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