Not sure what is this...
[11:27:04] [Server thread/INFO]: [Lift] Critical Error. Startfloor||DestFloor is null. Please report entire stacktrace plus the following error codes.
[11:27:04] [Server thread/INFO]: [Lift] Sign destination: 4
[11:27:04] [Server thread/INFO]: [Lift] Floormap: {66=net.croxis.plugins.lift.Floor@38fb4207, 70=net.croxis.plugins.lift.Floor@77abf6ca, 74=net.croxis.plugins.lift.Floor@3ad78527}
[11:27:04] [Server thread/INFO]: [Lift] Floormap2: {1=net.croxis.plugins.lift.Floor@38fb4207, 2=net.croxis.plugins.lift.Floor@77abf6ca, 3=net.croxis.plugins.lift.Floor@3ad78527}
[11:27:04] [Server thread/INFO]: [Lift] Start y: 66
[11:27:05] [Server thread/INFO]: TheKiller9119 issued server command: /home
[11:27:06] [Server thread/INFO]: [Lift] Critical Error. Startfloor||DestFloor is null. Please report entire stacktrace plus the following error codes.
[11:27:06] [Server thread/INFO]: [Lift] Sign destination: 4
[11:27:06] [Server thread/INFO]: [Lift] Floormap: {66=net.croxis.plugins.lift.Floor@7e0b95fe, 70=net.croxis.plugins.lift.Floor@2aa49758, 74=net.croxis.plugins.lift.Floor@1bcc2847}
[11:27:06] [Server thread/INFO]: [Lift] Floormap2: {1=net.croxis.plugins.lift.Floor@7e0b95fe, 2=net.croxis.plugins.lift.Floor@2aa49758, 3=net.croxis.plugins.lift.Floor@1bcc2847}
[11:27:06] [Server thread/INFO]: [Lift] Start y: 66
[11:27:07] [Server thread/INFO]: KimEmanuel issued server command: /spawn
[11:27:09] [Server thread/INFO]: [Lift] Critical Error. Startfloor||DestFloor is null. Please report entire stacktrace plus the following error codes.
[11:27:09] [Server thread/INFO]: [Lift] Sign destination: 4
[11:27:09] [Server thread/INFO]: [Lift] Floormap: {66=net.croxis.plugins.lift.Floor@119ce03d, 70=net.croxis.plugins.lift.Floor@5245cdd3, 74=net.croxis.plugins.lift.Floor@64cc01d7}
[11:27:09] [Server thread/INFO]: [Lift] Floormap2: {1=net.croxis.plugins.lift.Floor@119ce03d, 2=net.croxis.plugins.lift.Floor@5245cdd3, 3=net.croxis.plugins.lift.Floor@64cc01d7}
[11:27:09] [Server thread/INFO]: [Lift] Start y: 66
[11:27:11] [Server thread/INFO]: [Lift] Critical Error. Startfloor||DestFloor is null. Please report entire stacktrace plus the following error codes.
[11:27:11] [Server thread/INFO]: [Lift] Sign destination: 4
[11:27:11] [Server thread/INFO]: [Lift] Floormap: {66=net.croxis.plugins.lift.Floor@33b67955, 70=net.croxis.plugins.lift.Floor@10d7d5f9, 74=net.croxis.plugins.lift.Floor@4a20d712}
[11:27:11] [Server thread/INFO]: [Lift] Floormap2: {1=net.croxis.plugins.lift.Floor@33b67955, 2=net.croxis.plugins.lift.Floor@10d7d5f9, 3=net.croxis.plugins.lift.Floor@4a20d712}
[11:27:11] [Server thread/INFO]: [Lift] Start y: 66

The sign list floor four as a destination but there are only three floors. Right click on the destination sign to properly cycle it.