diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index fb76daafa..2f1ee9c21 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -48,7 +48,22 @@ export class UserResolver {
     user.hasElopage = result.data.hasElopage
     // read additional settings from settings table
     const userRepository = getCustomRepository(UserRepository)
-    const userEntity = await userRepository.findByPubkeyHex(user.pubkey)
+    let userEntity: void | DbUser
+    userEntity = await userRepository.findByPubkeyHex(user.pubkey).catch(() => {
+      userEntity = new DbUser()
+      userEntity.firstName = user.firstName
+      userEntity.lastName = user.lastName
+      userEntity.username = user.username
+      userEntity.email = user.email
+      userEntity.pubkey = Buffer.from(fromHex(user.pubkey))
+
+      userEntity.save().catch(() => {
+        throw new Error('error by save userEntity')
+      })
+    })
+    if (!userEntity) {
+      throw new Error('error with cannot happen')
+    }
 
     const userSettingRepository = getCustomRepository(UserSettingRepository)
     const coinanimation = await userSettingRepository
diff --git a/login_server/src/cpp/Crypto/Passphrase.cpp b/login_server/src/cpp/Crypto/Passphrase.cpp
index 6b3df0c5d..0b733777d 100644
--- a/login_server/src/cpp/Crypto/Passphrase.cpp
+++ b/login_server/src/cpp/Crypto/Passphrase.cpp
@@ -328,6 +328,7 @@ const Poco::UInt16* Passphrase::getWordIndices() const
 
 bool Passphrase::checkIfValid()
 {
+	if (!mWordSource) return false;
 	std::istringstream iss(mPassphraseString);
 	std::vector<std::string> results(std::istream_iterator<std::string>{iss},
 	std::istream_iterator<std::string>());
diff --git a/login_server/src/cpp/JSONInterface/JsonRequestHandler.cpp b/login_server/src/cpp/JSONInterface/JsonRequestHandler.cpp
index feab7043b..15846913b 100644
--- a/login_server/src/cpp/JSONInterface/JsonRequestHandler.cpp
+++ b/login_server/src/cpp/JSONInterface/JsonRequestHandler.cpp
@@ -81,22 +81,30 @@ void JsonRequestHandler::handleRequest(Poco::Net::HTTPServerRequest& request, Po
 	}
 
 	if (json_result) {
+		NotificationList errors;
 		if (!json_result->isNull("session_id")) {
 			int session_id = 0;
 			try {
 				json_result->get("session_id").convert(session_id);
 			}
 			catch (Poco::Exception& e) {
-				NotificationList erros;
-				erros.addError(new Error("json request", "invalid session_id"));
-				erros.sendErrorsAsEmail();
+				errors.addError(new Error("json request", "invalid session_id"));
 			}
 			if (session_id) {
 				auto session = SessionManager::getInstance()->getSession(session_id);
 				response.addCookie(session->getLoginCookie());
 			}
 		}
-		json_result->stringify(responseStream);
+		try {
+			json_result->stringify(responseStream);
+		}
+		catch (Poco::Exception& e) {
+			errors.addError(new ParamError("json request", "error on stringify from json result:", e.message()));
+			errors.addError(new ParamError("json request", "caller url", request.getURI()));
+		}
+		if (errors.errorCount()) {
+			errors.sendErrorsAsEmail();
+		}
 		delete json_result;
 	}
 
diff --git a/login_server/src/cpp/JSONInterface/JsonUnsecureLogin.cpp b/login_server/src/cpp/JSONInterface/JsonUnsecureLogin.cpp
index 5c06e27b8..991e412a0 100644
--- a/login_server/src/cpp/JSONInterface/JsonUnsecureLogin.cpp
+++ b/login_server/src/cpp/JSONInterface/JsonUnsecureLogin.cpp
@@ -114,6 +114,14 @@ Poco::JSON::Object* JsonUnsecureLogin::handle(Poco::Dynamic::Var params)
 	auto user_state = session->loadUser(email, password);
 	auto user_model = session->getNewUser()->getModel();
 	Poco::JSON::Array infos;
+
+	// AUTOMATIC ERROR CORRECTION
+	// if something went wrong by initial key generation for user, generate keys again
+	if (user_state >= USER_LOADED_FROM_DB && !user_model->getPublicKey()) {
+		if (session->generateKeys(true, true)) {
+			user_state = session->getNewUser()->getUserState();
+		}
+	}
 	
 	switch (user_state) {
 	case USER_EMPTY:
diff --git a/login_server/src/cpp/model/Session.cpp b/login_server/src/cpp/model/Session.cpp
index cf380929d..2fdd9ff2f 100644
--- a/login_server/src/cpp/model/Session.cpp
+++ b/login_server/src/cpp/model/Session.cpp
@@ -746,7 +746,7 @@ void Session::detectSessionState()
 		bool cryptedPassphrase = userBackups.size() > 0;
 		for (auto it = userBackups.begin(); it != userBackups.end(); it++) {
 			auto passphrase = (*it)->getModel()->getPassphrase();
-			Mnemonic* wordSource = nullptr;
+			const Mnemonic* wordSource = Passphrase::detectMnemonic(passphrase);
 			auto passphrase_obj = Passphrase::create(passphrase, wordSource);
 			if (!passphrase_obj.isNull() && passphrase_obj->checkIfValid()) {
 				auto key_pair = KeyPairEd25519::create(passphrase_obj);