Error to implementation of strategy pattern in C++ - c++

Question

I'm trying to implement the design pattern strategy in C++.
The goal for me is to do an operation on 2 numbers.
Here is my context class
operation::operation(std::unique_ptr<calculatorTask> pTask = nullptr)
{
pCalculatorTask = std::move(pTask);
}
operation::~operation();
{
}
void operation::setTask(std::unique_ptr<calculatorTask> pTask)
{
this->pCalculatorTask = std::move(pTask);
}
void operation::executeTask(numberMsg& sValues)
{
pCalculatorTask->calculate(values);
}
This is my implementation :
int main()
{
std::vector<std::unique_ptr<calculatorTask>> myOperation;
myOperation.push_back(std::move(std::unique_ptr<additionTask>(new additionTask())));
myOperation.push_back(std::move(std::unique_ptr<substractionTask>(new substractionTask())));
for (const auto &Ope : myOperation)
{
pOpe->setTask(Ope);
[...]
}
}
I have this error :
error: use of deleted function ‘std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = calculatorTask; _Dp = std::default_delete]’
pOpe->setTask(Ope);
I don't understand error and how to fix it.