this error happened after i pickup tar ,i played it for 5 days ,everything is right, but i pickup tar today,this error always happen . after this error whether i am creating a new world or restoring it.
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no matter what i do ,this error stack traceback always happened.

[00:06:27]: Warning: Widget:SetFocusFromChild is happening on a widget outside of the screen/widget hierachy. This will cause focus moves to fail. Is ScriptErrorWidget not a screen?
[00:06:27]: stack traceback:
scripts/widgets/widget.lua:605 in (method) SetFocusFromChild (Lua) <602-627>
scripts/widgets/widget.lua:624 in (method) SetFocusFromChild (Lua) <602-627>
scripts/widgets/widget.lua:624 in (method) SetFocusFromChild (Lua) <602-627>
scripts/widgets/widget.lua:656 in (method) SetFocus (Lua) <629-665>
scripts/widgets/menu.lua:83 in (method) SetFocus (Lua) <74-85>
scripts/widgets/scripterrorwidget.lua:109 in (method) OnUpdate (Lua) <102-119>
scripts/update.lua:90 in () ? (Lua) <33-129>

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this error stack traceback is happened after i built a street lamp


[00:06:27]: [string "../mods/workshop-1505270912/scripts/stategr..."]:30: attempt to index local 'wave' (a nil value)
LUA ERROR stack traceback:
../mods/workshop-1505270912/scripts/stategraphs/SGtigershark_water.lua:30 in (global) SpawnWaves (Lua) <5-53>
inst = 104947 - whale_blue (valid:true)
numWaves = 2
totalAngle = 20
waveSpeed = nil
wavePrefab = rogue_wave
initialOffset = nil
idleTime = nil
instantActive = true
random_angle = nil
pos = (-776.95, 0.00, -227.35)
startAngle = -40.777603149414
anglePerWave = 20
i = 0
wave = nil
angle = -50.777603149414
rad = 0.75
../mods/workshop-1505270912/scripts/stategraphs/SGwhale.lua:128 in (field) fn (Lua) <124-132>
inst = 104947 - whale_blue (valid:true)
scripts/stategraph.lua:574 in (method) UpdateState (Lua) <542-586>
self =
tags = table: 44BE4AD8
mem = table: 2A8AAB20
statemem = table: 44BE4B00
currentstate = table: 1B1A50D8
timeinstate = 0.83333337679505
sg = Stategraph : whale
inst = 104947 - whale_blue (valid:true)
bufferedevents = table: 248E3FB0
lastupdatetime = 210.70001098886
statestarttime = 209.86667761207
laststate = table: 1B1A5600
prevstate = table: 1B1A5600
dt = 0.46666669100523
startstate = table: 1B1A50D8
idx = 2
old_time = 0.83333337679505
extra_time = 4.3461720111715e-008
scripts/stategraph.lua:613 in (method) Update (Lua) <605-633>
self =
tags = table: 44BE4AD8
mem = table: 2A8AAB20
statemem = table: 44BE4B00
currentstate = table: 1B1A50D8
timeinstate = 0.83333337679505
sg = Stategraph : whale
inst = 104947 - whale_blue (valid:true)
bufferedevents = table: 248E3FB0
lastupdatetime = 210.70001098886
statestarttime = 209.86667761207
laststate = table: 1B1A5600
prevstate = table: 1B1A5600
dt = 0.46666669100523
scripts/stategraph.lua:128 in (method) Update (Lua) <109-153>
self =
updaters = table: 248F9D50
OnEnterNewState = function - scripts/stategraph.lua:27
tickwaiters = table: 090401C8
haveEvents = table: 248E3CE0
hibernaters = table: 09040010
instances = table: 09040150
current_tick = 6321
waiters = table: 07C6A7A8
updaters = table: 248E38D0
k = sg="whale", state="attack", time=0.83, tags = "busy,canrotate,attack,"
v = true
prefab = whale_blue
scripts/update.lua:228 in () ? (Lua) <159-238>
dt = 0.033333335071802
tick = 6321
i = 6321

[00:06:27]: [string "../mods/workshop-1505270912/scripts/stategr..."]:30: attempt to index local 'wave' (a nil value)
LUA ERROR stack traceback:
../mods/workshop-1505270912/scripts/stategraphs/SGtigershark_water.lua:30 in (global) SpawnWaves (Lua) <5-53>
../mods/workshop-1505270912/scripts/stategraphs/SGwhale.lua:128 in (field) fn (Lua) <124-132>
scripts/stategraph.lua:574 in (method) UpdateState (Lua) <542-586>
scripts/stategraph.lua:613 in (method) Update (Lua) <605-633>
scripts/stategraph.lua:128 in (method) Update (Lua) <109-153>
scripts/update.lua:228 in () ? (Lua) <159-238>

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and more error stack traceback.