IOS BUILD ERROR: Problem linking the app.

** SOLVED **

Issue was vungle plug in. Using corona Build: 2017.3081 resolves this issue and it now builds fine.

After upgrading to OS Sierra and installing xcode 8.3.2 when I try to build for ios (using corona build 3068( i keep getting this error.

Build Failed

There was a problem linking the app.

ERROR: Builder failed: ld: warning: directory not found for option ‘-F/Users/admin/Desktop/BUILD/myApp.app/Frameworks’

May 20 11:14:12.460 undef: __ZNSs4_Rep20_S_empty_rep_storageE

                    undef: __ZNKSs7compareEPKc

                    undef: __ZNSsC1EPKcRKSaIcE

                    undef: __ZNSs6assignEPKcm

                    undef: __ZNSs4_Rep10_M_destroyERKSaIcE

                    Undefined symbols for architecture armv7:

                      “std::string::_Rep::_S_empty_rep_storage”, referenced from:

                          Corona::Vungle::Show(lua_State*) in libads-vungle.a(VungleAds.o)

                      “std::string::compare(char const*) const”, referenced from:

                          Corona::Vungle::Show(lua_State*) in libads-vungle.a(VungleAds.o)

                      “std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)”, referenced from:

                          Corona::Vungle::Show(lua_State*) in libads-vungle.a(VungleAds.o)

                      “std::string::assign(char const*, unsigned long)”, referenced from:

                          Corona::Vungle::Show(lua_State*) in libads-vungle.a(VungleAds.o)

                      “std::string::_Rep::_M_destroy(std::allocator<char> const&)”, referenced from:

                          Corona::Vungle::Show(lua_State*) in libads-vungle.a(VungleAds.o)

                    ld: symbol(s) not found for architecture armv7

                    clang: error: linker command failed with exit code 1 (use -v to see invocation)

Below is my build.settings plugins section:

plugins = {

[“CoronaProvider.gameNetwork.apple”] =

{publisherId = “com.coronalabs”,supportedPlatforms =

{ iphone=true, [“iphone-sim”]=true },

},

[“CoronaProvider.ads.vungle”] =

{publisherId = “com.vungle”,

},

},

Any ideas? The directory/path to build to is correct. Is it to do with vungle ads no longer being compatible? Buildling for IOS worked fine before upgrading to os sierra and xcode 8.3.2. Cannot recall if I used 3068 for building on IOS before.