영어도사님들 해석 좀 부탁드리겠습니다..

This circuit has no power sources: unable to determine the simulation timestep automatically.

Please add a power source or set the simulation timestep under

"Interactive Simulation Settings" to proceed.

해석좀 ㅠㅠㅠㅠㅠㅠㅠㅠㅠㅠㅠㅠ