Padding is invalid and cannot be removed error in 3.0 (preview)

I had 2.6 running and did a fresh a 3.0 installation on the same box. Getting this error at the last step.

Padding is invalid and cannot be removed.
System.Security.Cryptography.CryptographicException: Padding is invalid and cannot be removed.
at System.Security.Cryptography.CapiSymmetricAlgorithm.DepadBlock(Byte[] block, Int32 offset, Int32 count)
at System.Security.Cryptography.CapiSymmetricAlgorithm.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount)
at System.Security.Cryptography.CryptoStream.FlushFinalBlock()
at System.Security.Cryptography.CryptoStream.Dispose(Boolean disposing)
at System.IO.Stream.Close()
at Octopus.Shared.Security.MasterKey.MasterKeyEncryption.ToPlaintext(Byte[] masterKey, EncryptedBytes encrypted) in y:\work\refs\heads\release\source\Octopus.Shared\Security\MasterKey\MasterKeyEncryption.cs:line 86
at Octopus.Shared.Security.MasterKey.MasterKeyEncryptionExtensions.ToPlaintextString(IMasterKeyEncryption encryption, EncryptedBytes encrypted) in y:\work\refs\heads\release\source\Octopus.Shared\Security\MasterKey\MasterKeyEncryptionExtensions.cs:line 20
at Octopus.Core.RelationalStorage.EncryptedValueConverter.Decrypt(EncryptedBytes bytes, Type objectType) in y:\work\refs\heads\release\source\Octopus.Core\RelationalStorage\EncryptedValueConverter.cs:line 91
at Octopus.Core.RelationalStorage.EncryptedValueConverter.ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer) in y:\work\refs\heads\release\source\Octopus.Core\RelationalStorage\EncryptedValueConverter.cs:line 75
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable(JsonConverter converter, JsonReader reader, Type objectType, Object existingValue)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue(JsonProperty property, JsonConverter propertyConverter, JsonContainerContract containerContract, JsonProperty containerProperty, JsonReader reader, Object target)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)
at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)
at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)
at Octopus.Core.RelationalStorage.RelationalTransaction.d__171.MoveNext() in y:\work\refs\heads\release\source\Octopus.Core\RelationalStorage\RelationalTransaction.cs:line 230 at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable1 source)
at Octopus.Core.Initialization.BuiltIn.OctopusCertificateInitializer.Initialize(IRelationalStore store) in y:\work\refs\heads\release\source\Octopus.Core\Initialization\BuiltIn\OctopusCertificateInitializer.cs:line 32
at Octopus.Core.Initialization.StoreInitializer.Initialize() in y:\work\refs\heads\release\source\Octopus.Core\Initialization\StoreInitializer.cs:line 22
at Octopus.Server.Commands.AdminCommand.Start() in y:\work\refs\heads\release\source\Octopus.Server\Commands\AdminCommand.cs:line 65
at Octopus.Shared.Startup.AbstractCommand.Octopus.Shared.Startup.ICommand.Start(String[] commandLineArguments, ICommandRuntime commandRuntime, OptionSet commonOptions) in y:\work\refs\heads\release\source\Octopus.Shared\Startup\AbstractCommand.cs:line 57
at Octopus.Shared.Startup.ConsoleHost.Run(Action`1 start, Action shutdown) in y:\work\refs\heads\release\source\Octopus.Shared\Startup\ConsoleHost.cs:line 81
at Octopus.Shared.Startup.OctopusProgram.Run() in y:\work\refs\heads\release\source\Octopus.Shared\Startup\OctopusProgram.cs:line 70
Error: The previous command returned a non-zero exit code of: 100
Error: The command that failed was: “C:\Program Files\Octopus Deploy\Octopus\Octopus.Server.exe” admin --instance “OctopusServer” --username “” --password ""
Deleted instance: OctopusServer

Hi,

We are only processing 3.0 related issues on the new Community Forum. We are trying to keep 2.x issues and 3.0 pre-release issues separate.

If you could please post your problem at community.octopusdeploy.com. You might even find the the issue has already been reported.

Thanks!
Vanessa