Refine impl:

* rename wrapper to cache
* reset the cache to null if error during config loading happens
* always set the the cache in the vault obj

src/main/java/org/cryptomator/common/vaults/Vault.java

@@ -58,7 +58,7 @@ public class Vault {
 	private final AtomicReference<CryptoFileSystem> cryptoFileSystem;
 	private final VaultState state;
 	private final ObjectProperty<Exception> lastKnownException;
-	private final VaultConfigWrapper configWrapper;
+	private final VaultConfigCache configWrapper;
 	private final VaultStats stats;
 	private final StringBinding displayName;
 	private final StringBinding displayablePath;
@@ -75,7 +75,7 @@ public class Vault {
 	private volatile Volume volume;
 
 	@Inject
-	Vault(VaultSettings vaultSettings, VaultConfigWrapper configWrapper, Provider<Volume> volumeProvider, @DefaultMountFlags StringBinding defaultMountFlags, AtomicReference<CryptoFileSystem> cryptoFileSystem, VaultState state, @Named("lastKnownException") ObjectProperty<Exception> lastKnownException, VaultStats stats) {
+	Vault(VaultSettings vaultSettings, VaultConfigCache configWrapper, Provider<Volume> volumeProvider, @DefaultMountFlags StringBinding defaultMountFlags, AtomicReference<CryptoFileSystem> cryptoFileSystem, VaultState state, @Named("lastKnownException") ObjectProperty<Exception> lastKnownException, VaultStats stats) {
 		this.vaultSettings = vaultSettings;
 		this.configWrapper = configWrapper;
 		this.volumeProvider = volumeProvider;
@@ -368,7 +368,7 @@ public class Vault {
 		try {
 			return configWrapper.getConfig();
 		} catch (IOException e) {
-			throw new IllegalStateException("One should not accquire the config if thee is not present.");
+			throw new IllegalStateException("Vault Config not present.");
 		}
 
 	}

src/main/java/org/cryptomator/common/vaults/VaultComponent.java

@@ -10,7 +10,6 @@ import dagger.Subcomponent;
 import org.cryptomator.common.Nullable;
 import org.cryptomator.common.mountpoint.MountPointChooserModule;
 import org.cryptomator.common.settings.VaultSettings;
-import org.cryptomator.cryptofs.VaultConfig;
 
 import javax.inject.Named;
 
@@ -27,7 +26,7 @@ public interface VaultComponent {
 		Builder vaultSettings(VaultSettings vaultSettings);
 
 		@BindsInstance
-		Builder vaultConfigWrapper(VaultConfigWrapper rapper);
+		Builder vaultConfigCache(VaultConfigCache configCache);
 
 		@BindsInstance
 		Builder initialVaultState(VaultState.Value vaultState);

src/main/java/org/cryptomator/common/vaults/VaultConfigWrapper.java

@@ -5,7 +5,6 @@ import org.cryptomator.common.settings.VaultSettings;
 import org.cryptomator.cryptofs.VaultConfig;
 import org.cryptomator.cryptofs.VaultConfigLoadException;
 
-import javax.inject.Inject;
 import javafx.beans.property.ObjectProperty;
 import javafx.beans.property.SimpleObjectProperty;
 import java.io.IOException;
@@ -17,18 +16,23 @@ import java.util.Objects;
 /**
  * Wrapper for lazy loading and on-demand reloading of the vault configuration.
  */
-public class VaultConfigWrapper {
+public class VaultConfigCache {
 
 	private final VaultSettings settings;
 	private final ObjectProperty<VaultConfig.UnverifiedVaultConfig> config;
 
-	VaultConfigWrapper(VaultSettings settings) {
+	VaultConfigCache(VaultSettings settings) {
 		this.settings = settings;
 		this.config = new SimpleObjectProperty<>();
 	}
 
 	void reloadConfig() throws IOException {
-		config.set(readConfigFromStorage(this.settings.path().get()));
+		try {
+			config.set(readConfigFromStorage(this.settings.path().get()));
+		} catch (IOException e) {
+			config.set(null);
+			throw e;
+		}
 	}
 
 	VaultConfig.UnverifiedVaultConfig getConfig() throws IOException {

src/main/java/org/cryptomator/common/vaults/VaultListManager.java

@@ -12,7 +12,6 @@ import org.cryptomator.common.settings.Settings;
 import org.cryptomator.common.settings.VaultSettings;
 import org.cryptomator.cryptofs.CryptoFileSystemProvider;
 import org.cryptomator.cryptofs.DirStructure;
-import org.cryptomator.cryptofs.VaultConfig;
 import org.cryptomator.cryptofs.migration.Migrators;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -97,9 +96,9 @@ public class VaultListManager {
 		VaultComponent.Builder compBuilder = vaultComponentBuilder.vaultSettings(vaultSettings);
 		try {
 			VaultState.Value vaultState = determineVaultState(vaultSettings.path().get());
-			if (vaultState == LOCKED) {
-				VaultConfigWrapper wrapper = new VaultConfigWrapper(vaultSettings);
-				compBuilder.vaultConfigWrapper(wrapper); //first set the wrapper in the builder, THEN try to load config
+			VaultConfigCache wrapper = new VaultConfigCache(vaultSettings);
+			compBuilder.vaultConfigCache(wrapper); //first set the wrapper in the builder, THEN try to load config
+			if (vaultState == LOCKED) { //for legacy reasons: pre v8 vault do not have a config, but they are in the NEEDS_MIGRATION state
 				wrapper.reloadConfig();
 			}
 			compBuilder.initialVaultState(vaultState);