That is the primary error message stating that the linker tries to InsertNewText(char const)* link two compiled functions with the same name.
The two lines befor that states which files contain the compiled function.
'Compiling' consist of a few steps; the last one is the linking of the compiled files and ld refers to / is the linker.
FYI, your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advise on) your project 
See About the IDE 1.x category.