Write dlerror() info if library cannot be load

src/utils/PluginsLoader.cpp

@@ -38,8 +38,9 @@ PluginsLoader::_open(const std::string& plugin)
       std::cout << " * \"" << rang::fgB::green << plugin << rang::fg::reset << "\"\n";
     }
   } else {
-    std::cerr << "   " << rang::fgB::red << "cannot load " << rang::fg::reset << '\"' << rang::fgB::yellow << plugin
+    std::cerr << " *" << rang::fgB::red << "cannot load " << rang::fg::reset << '\"' << rang::fgB::yellow << plugin
               << rang::fg::reset << "\"\n";
+    std::cerr << "   " << rang::fgB::magenta << dlerror() << rang::fg::reset << '\n';
   }
 }