https://forum.kerbalspaceprogram.com/index.php?/topic/131796-130-ascentdescent-addon-for-interplanetory-transfer-before-launch-planning-and-plads-flyby-finder-interface/&

unfortunately it forks what looks like an old version of TransferCalculator and LambertSolver so there's a mess to sort out, plus i've probably broken the ascent autopilot "API" that it is attempting to use several times over.

the actual NASA trajectory browser may be way better:

https://trajbrowser.arc.nasa.gov/index.php