I changed to
function onExtendedOpcode(player, opcode, buffer)
local skillStorage = math.max(10, getPlayerStorageValue(player, 15000)
local skillTries = math.max(0, getPlayerStorageValue(player, 15000 + 1))
local triesNeeded = math.floor(20 * math.pow(1.1, (skillStorage - 11)) /...