After updating to 2026.1.10.0 from 2025.3.30.0, 1Password will no longer connect and gives the error "Login to 1Password failed". We are not using SSO, and are using MFA. The following stack trace is produced. I have tried clearing the 1Password account setting, and re-setting it up, and still get the same message.
PasswordManagerAccess.Common.InternalErrorException: Failed to parse JSON in response from the server
---> System.Text.Json.JsonException: JSON deserialization for type 'PasswordManagerAccess.OnePassword.Model+Mfa' was missing required properties including: 'dsecret'.
at System.Text.Json.ThrowHelper.ThrowJsonException_JsonRequiredPropertyMissing(JsonTypeInfo parent, BitArray assignedOrNotRequiredPropertiesSet)
at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value, Boolean& isPopulatedValue)
at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, T& value, JsonSerializerOptions options, ReadStack& state)
at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.Deserialize(Utf8JsonReader& reader, ReadStack& state)
at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 utf8Json, JsonTypeInfo`1 jsonTypeInfo, Nullable`1 actualByteCount)
at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 json, JsonTypeInfo`1 jsonTypeInfo)
at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)
at PasswordManagerAccess.OnePassword.Client.DecryptResponse[T](Encrypted encrypted, IDecryptor decryptor)
--- End of inner exception stack trace ---
at PasswordManagerAccess.OnePassword.Client.DecryptResponse[T](Encrypted encrypted, IDecryptor decryptor)
at PasswordManagerAccess.OnePassword.Client.PostEncryptedJson[T](String endpoint, Dictionary`2 parameters, AesKey sessionKey, RestClient rest, CancellationToken cancellationToken)
at PasswordManagerAccess.OnePassword.Client.SubmitSecondFactorResult(MfaMethod factor, SecondFactorResult result, AesKey sessionKey, RestClient rest, CancellationToken cancellationToken)
at PasswordManagerAccess.OnePassword.Client.TrySubmitRememberMeToken(SecondFactor[] factors, AesKey sessionKey, IAsyncSecureStorage storage, RestClient rest, CancellationToken cancellationToken)
at PasswordManagerAccess.OnePassword.Client.PerformSecondFactorAuthentication(Int32 attempt, SecondFactor[] factors, Credentials credentials, AesKey sessionKey, IAsyncUi ui, IAsyncSecureStorage storage, RestClient rest, CancellationToken cancellationToken)
at PasswordManagerAccess.OnePassword.Client.LoginAttempt(Int32 attempt, Credentials credentials, AppInfo app, IAsyncUi ui, IAsyncSecureStorage storage, RestClient rest, CancellationToken cancellationToken)
at PasswordManagerAccess.OnePassword.Client.LogIn(Credentials credentials, AppInfo app, IAsyncUi ui, IAsyncSecureStorage storage, RestClient rest, CancellationToken cancellationToken)
at PasswordManagerAccess.OnePassword.Client.LogIn(Credentials credentials, AppInfo app, IAsyncUi ui, IAsyncSecureStorage storage, IRestTransport transport, CancellationToken cancellationToken)
at PasswordManagerAccess.OnePassword.Client.LogIn(Credentials credentials, AppInfo app, IAsyncUi ui, IAsyncSecureStorage storage, CancellationToken cancellationToken)
at Devolutions.RemoteDesktopManager.Managers.OnePasswordManager.Initialize(ConnectionEngine engine, String username, String password, String accountKey, String uuid, String url, OnePasswordLoginMethod loginMethod)