Attempt to concatenate field 'id' (a nil value)

Hi, I'm new to programming and recently got this error on the snapAndPlay

Version: 2.8.9
find 3
Runtime error: /sdcard/AnkuLua/snapAndPlay/snapAndPlay.lua:1167:attempt to concatenate field 'id' (a nil value)

And here's my potato code (any idea what I'm doing wrong?): 


----- start mining the rocks here and remember compass north view up -----



a = 1

repeat



wait1 = math.random(111, 999) * 0.001 + 3

wait2 = math.random(111, 999) * 0.001 + 3

wait3 = math.random(111, 999) * 0.001 + 3





------ 1 -----

touchList[index] = {target = "3.png", region = Region(567, 397, 160, 160), id = "3", action = 'click'}

waitList[index] = wait1

index = index + 1



------ 2 -----

touchList[index] = {target = "1.png", region = Region(559, 209, 160, 160), id = "1", action = 'click'}

waitList[index] = wait2

index = index + 1



------ 3 -----

touchList[index] = {target = "2.png", region = Region(459, 304, 160, 160), id = "2", action = 'click'}

waitList[index] = wait3

index = index + 1



a = a + 1



until(a>9)





------ 1 -----

touchList[index] = {"click", Location(972, 326)}

index = index + 2



------ 2 -----

touchList[index] = {"click", Location(972, 380)}

index = index + 2



------ 3 -----

touchList[index] = {"click", Location(974, 436)}

index = index + 2



------ 4 -----

touchList[index] = {"click", Location(975, 482)}

index = index + 2



------ 5 -----

touchList[index] = {"click", Location(973, 537)}

index = index + 2



------ 6 -----

touchList[index] = {"click", Location(973, 585)}

index = index + 2



------ 7 -----

touchList[index] = {"click", Location(973, 637)}

index = index + 2



------ 8 -----

touchList[index] = {"click", Location(1031, 641)}

index = index + 2



------ 9 -----

touchList[index] = {"click", Location(1032, 585)}

index = index + 2



------ 10 -----

touchList[index] = {"click", Location(1033, 536)}

index = index + 2



------ 11 -----

touchList[index] = {"click", Location(1030, 485)}

index = index + 2



------ 12 -----

touchList[index] = {"click", Location(1032, 434)}

index = index + 2



------ 13 -----

touchList[index] = {"click", Location(1031, 381)}

index = index + 2



------ 14 -----

touchList[index] = {"click", Location(1031, 330)}

index = index + 2



------ 15 -----

touchList[index] = {"click", Location(1098, 327)}

index = index + 2



------ 16 -----

touchList[index] = {"click", Location(1098, 381)}

index = index + 2



------ 17 -----

touchList[index] = {"click", Location(1098, 436)}

index = index + 2



------ 18 -----

touchList[index] = {"click", Location(1098, 488)}

index = index + 2



------ 19 -----

touchList[index] = {"click", Location(1098, 539)}

index = index + 2



------ 20 -----

touchList[index] = {"click", Location(1098, 588)}

index = index + 2



------ 21 -----

touchList[index] = {"click", Location(1098, 641)}

index = index + 2



------ 22 -----

touchList[index] = {"click", Location(1155, 641)}

index = index + 2



------ 23 -----

touchList[index] = {"click", Location(1155, 590)}

index = index + 2



------ 24 -----

touchList[index] = {"click", Location(1155, 536)}

index = index + 2



------ 25 -----

touchList[index] = {"click", Location(1155, 484)}

index = index + 2



------ 26 -----

touchList[index] = {"click", Location(1155, 434)}

index = index + 2



------ 27 -----

touchList[index] = {"click", Location(1155, 381)}

index = index + 2