diff --git a/.changeset/short-lies-behave.md b/.changeset/short-lies-behave.md
new file mode 100644
index 00000000..48d6790e
--- /dev/null
+++ b/.changeset/short-lies-behave.md
@@ -0,0 +1,5 @@
+---
+'react-native-app-auth': patch
+---
+
+fix hard crash if config object was incorrect
diff --git a/packages/react-native-app-auth/index.js b/packages/react-native-app-auth/index.js
index 829b6406..7b8f4a4a 100644
--- a/packages/react-native-app-auth/index.js
+++ b/packages/react-native-app-auth/index.js
@@ -4,29 +4,31 @@ import base64 from 'react-native-base64';
 
 const { RNAppAuth } = NativeModules;
 
-const validateIssuerOrServiceConfigurationEndpoints = (issuer, serviceConfiguration) =>
+const validateIssuer = issuer => typeof issuer === 'string' && issuer.length;
+const validateIssuerOrServiceConfigurationEndpoints = (issuer, serviceConfiguration) => {
   invariant(
-    typeof issuer === 'string' ||
+    validateIssuer(issuer) ||
       (serviceConfiguration &&
         typeof serviceConfiguration.authorizationEndpoint === 'string' &&
         typeof serviceConfiguration.tokenEndpoint === 'string'),
     'Config error: you must provide either an issuer or a service endpoints'
   );
+};
 const validateIssuerOrServiceConfigurationRegistrationEndpoint = (issuer, serviceConfiguration) =>
   invariant(
-    typeof issuer === 'string' ||
+    validateIssuer(issuer) ||
       (serviceConfiguration && typeof serviceConfiguration.registrationEndpoint === 'string'),
     'Config error: you must provide either an issuer or a registration endpoint'
   );
 const validateIssuerOrServiceConfigurationRevocationEndpoint = (issuer, serviceConfiguration) =>
   invariant(
-    typeof issuer === 'string' ||
+    validateIssuer(issuer) ||
       (serviceConfiguration && typeof serviceConfiguration.revocationEndpoint === 'string'),
     'Config error: you must provide either an issuer or a revocation endpoint'
   );
 const validateIssuerOrServiceConfigurationEndSessionEndpoint = (issuer, serviceConfiguration) =>
   invariant(
-    typeof issuer === 'string' ||
+    validateIssuer(issuer) ||
       (serviceConfiguration && typeof serviceConfiguration.endSessionEndpoint === 'string'),
     'Config error: you must provide either an issuer or an end session endpoint'
   );