I have similar problem
I have current stable IDE..(version 10804). Windows....VIsual studio 17 64 bit
Why is it calling a copy constructor at map.h 212

threads[free_index].Run ( THISBACK5 ( execute_bot_in_background, bot1, a, params, result_mode, stat_group_id ) );

main.cpp(1502): error C2280: 'Upp::VectorMap<Upp::String,double>::VectorMap(const Upp::VectorMap<Upp::String,double> &)': attempting to reference 
    a deleted function
d:\upp\uppsrc\core\Map.h(212): note: compiler has generated 'Upp::VectorMap<Upp::String,double>::VectorMap' here
d:\upp\uppsrc\core\Map.h(212): note: 'Upp::VectorMap<Upp::String,double>::VectorMap(const Upp::VectorMap<Upp::String,double> &)': function was implicitly deleted becau
    se a base class invokes a deleted or inaccessible function 'Upp::AMap<K,T,Upp::Vector<T>>::AMap(const Upp::AMap<K,T,Upp::Vector<T>> &)'
        with
        [
            K=Upp::String,
            T=double
        ]
d:\upp\uppsrc\core\Map.h(190): note: 'Upp::AMap<K,T,Upp::Vector<T>>::AMap(const Upp::AMap<K,T,Upp::Vector<T>> &)': function was implicitly deleted because a data membe
    r invokes a deleted or inaccessible function 'Upp::Index<Upp::String>::Index(const Upp::Index<Upp::String> &)'
        with
        [
            K=Upp::String,
            T=double
        ]
d:\upp\uppsrc\core\Index.h(210): note: 'Upp::Index<Upp::String>::Index(const Upp::Index<Upp::String> &)': function was implicitly deleted because 'Upp::Index<Upp::Stri
    ng>' has a user-defined move constructor
        ]