diff --git a/builtin/mainmenu/dlg_config_world.lua b/builtin/mainmenu/dlg_config_world.lua
index 36cc5580c..db6963b78 100644
--- a/builtin/mainmenu/dlg_config_world.lua
+++ b/builtin/mainmenu/dlg_config_world.lua
@@ -85,8 +85,13 @@ local function check_mod_configuration(world_path, all_mods)
 
 	-- Build the table of errors
 	local with_error = {}
+	for _, mod in ipairs(config_status.satisfied_mods) do
+		if not mod.valid then
+			with_error[mod.virtual_path] = { type = "error", reason = "invalid" }
+		end
+	end
 	for _, mod in ipairs(config_status.unsatisfied_mods) do
-		local error = { type = "warning" }
+		local error = { type = "warning", reason = "unsatisfied_depends" }
 		with_error[mod.virtual_path] = error
 
 		for _, depname in ipairs(mod.unsatisfied_depends) do
@@ -155,6 +160,24 @@ local function get_formspec(data)
 		local hard_deps_str = table.concat(hard_deps, ",")
 		local soft_deps_str = table.concat(soft_deps, ",")
 
+		local error_message = ""
+
+		local error = with_error[mod.virtual_path]
+		if error and
+			error.type == "error" and
+			-- do not display "unsatisfied_depends" error as message because is
+			-- is displayed by dependency list
+			error.reason ~= "unsatisfied_depends"
+		then
+			error_message = error_message ..
+			minetest.colorize(mt_color_red, fgettext("Errors:")) .. "\n"
+			if error.reason == "invalid" then
+				error_message = error_message .. fgettext(
+				"Mod is incomplete because it has no \"init.lua\" file. " ..
+				"Dependencies are not visible because of this.")
+			end
+		end
+
 		retval = retval ..
 			"label[0,0.7;" .. fgettext("Mod:") .. "]" ..
 			"label[0.75,0.7;" .. mod.name .. "]"
@@ -163,7 +186,8 @@ local function get_formspec(data)
 			if soft_deps_str == "" then
 				retval = retval ..
 					"label[0,1.25;" ..
-					fgettext("No (optional) dependencies") .. "]"
+					fgettext("No (optional) dependencies") .. "]" ..
+					"textarea[0.25,1.75;5.75,7.2;;" .. error_message .. ";]"
 			else
 				retval = retval ..
 					"label[0,1.25;" .. fgettext("No hard dependencies") ..
@@ -171,7 +195,8 @@ local function get_formspec(data)
 					"label[0,1.75;" .. fgettext("Optional dependencies:") ..
 					"]" ..
 					"textlist[0,2.25;5,4;world_config_optdepends;" ..
-					soft_deps_str .. ";0]"
+					soft_deps_str .. ";0]" ..
+					"textarea[0.25,6.5;3.45,1.75;;" .. error_message .. ";]"
 			end
 		else
 			if soft_deps_str == "" then
@@ -179,7 +204,8 @@ local function get_formspec(data)
 					"label[0,1.25;" .. fgettext("Dependencies:") .. "]" ..
 					"textlist[0,1.75;5,4;world_config_depends;" ..
 					hard_deps_str .. ";0]" ..
-					"label[0,6;" .. fgettext("No optional dependencies") .. "]"
+					"label[0,6;" .. fgettext("No optional dependencies") .. "]" ..
+					"textarea[0.25,6.5;3.45,1.75;;" .. error_message .. ";]"
 			else
 				retval = retval ..
 					"label[0,1.25;" .. fgettext("Dependencies:") .. "]" ..
@@ -188,7 +214,8 @@ local function get_formspec(data)
 					"label[0,3.9;" .. fgettext("Optional dependencies:") ..
 					"]" ..
 					"textlist[0,4.375;5,1.8;world_config_optdepends;" ..
-					soft_deps_str .. ";0]"
+					soft_deps_str .. ";0]" ..
+					"textarea[0.25,6.5;3.45,1.75;;" .. error_message .. ";]"
 			end
 		end
 	end
diff --git a/src/content/mods.h b/src/content/mods.h
index fc98d9298..475f997ef 100644
--- a/src/content/mods.h
+++ b/src/content/mods.h
@@ -34,6 +34,7 @@ struct ModSpec
 	std::unordered_set<std::string> optdepends;
 	std::unordered_set<std::string> unsatisfied_depends;
 
+	bool valid = true;  /// False if incomplete
 	bool part_of_modpack = false;
 	bool is_modpack = false;
 
diff --git a/src/script/common/c_content.cpp b/src/script/common/c_content.cpp
index 91aa5b405..804cf85cb 100644
--- a/src/script/common/c_content.cpp
+++ b/src/script/common/c_content.cpp
@@ -2599,4 +2599,7 @@ void push_mod_spec(lua_State *L, const ModSpec &spec, bool include_unsatisfied)
 		lua_rawseti(L, -2, i++);
 	}
 	lua_setfield(L, -2, "unsatisfied_depends");
+
+	lua_pushboolean(L, spec.valid);
+	lua_setfield(L, -2, "valid");
 }
diff --git a/src/script/cpp_api/s_base.cpp b/src/script/cpp_api/s_base.cpp
index ba931b22a..49be9144c 100644
--- a/src/script/cpp_api/s_base.cpp
+++ b/src/script/cpp_api/s_base.cpp
@@ -233,6 +233,11 @@ std::string ScriptApiBase::getCurrentModNameInsecure(lua_State *L)
 void ScriptApiBase::loadMod(const std::string &script_path,
 		const std::string &mod_name)
 {
+	if (!fs::IsFile(script_path)) {
+		throw ModError("Failed to load mod \"" + mod_name
+			+ "\" as it's initialization script at \"" + script_path
+			+ "\" does not exist. Try to reinstall/update mod or disable it.");
+	}
 	ModNameStorer mod_name_storer(getStack(), mod_name);
 
 	loadScript(script_path);
diff --git a/src/script/lua_api/l_mainmenu.cpp b/src/script/lua_api/l_mainmenu.cpp
index 4b878ee1c..ed4ca476f 100644
--- a/src/script/lua_api/l_mainmenu.cpp
+++ b/src/script/lua_api/l_mainmenu.cpp
@@ -461,9 +461,7 @@ int ModApiMainMenu::l_check_mod_configuration(lua_State *L)
 		spec.name = fs::GetFilenameFromPath(modpath.c_str());
 		spec.path = modpath;
 		spec.virtual_path = virtual_path;
-		if (!parseModContents(spec)) {
-			throw LuaError("Not a mod!");
-		}
+		spec.valid = parseModContents(spec);
 	}
 
 	modmgr.addMods(modSpecs);