MySQL Error: UNITYTLS_X509VERIFY_NOT_DONE

Hello,
I'm trying to connect a Unity project to a remote MySQL database (first time I try this).
I've been stuck for hours due to this error:

Code (CSharp):

1. TlsException: Handshake failed - error code: UNITYTLS_INTERNAL_ERROR, verify result: UNITYTLS_X509VERIFY_NOT_DONE
2. Mono.Unity.Debug.CheckAndThrow (Mono.Unity.UnityTls+unitytls_errorstate errorState, Mono.Unity.UnityTls+unitytls_x509verify_result verifyResult, System.String context, Mono.Security.Interface.AlertDescription defaultAlert) (at <aa976c2104104b7ca9e1785715722c9d>:0)
3. Mono.Unity.UnityTlsContext.ProcessHandshake () (at <aa976c2104104b7ca9e1785715722c9d>:0)
4. Mono.Net.Security.MobileAuthenticatedStream.ProcessHandshake (Mono.Net.Security.AsyncOperationStatus status) (at <aa976c2104104b7ca9e1785715722c9d>:0)
5. (wrapper remoting-invoke-with-check) Mono.Net.Security.MobileAuthenticatedStream.ProcessHandshake(Mono.Net.Security.AsyncOperationStatus)
6. Mono.Net.Security.AsyncHandshakeRequest.Run (Mono.Net.Security.AsyncOperationStatus status) (at <aa976c2104104b7ca9e1785715722c9d>:0)
7. Mono.Net.Security.AsyncProtocolRequest+<ProcessOperation>d__24.MoveNext () (at <aa976c2104104b7ca9e1785715722c9d>:0)
8. --- End of stack trace from previous location where exception was thrown ---
9. System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () (at <9577ac7a62ef43179789031239ba8798>:0)
10. System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) (at <9577ac7a62ef43179789031239ba8798>:0)
11. System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) (at <9577ac7a62ef43179789031239ba8798>:0)
12. System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) (at <9577ac7a62ef43179789031239ba8798>:0)
13. System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult () (at <9577ac7a62ef43179789031239ba8798>:0)
14. Mono.Net.Security.AsyncProtocolRequest+<StartOperation>d__23.MoveNext () (at <aa976c2104104b7ca9e1785715722c9d>:0)
15. Rethrow as AuthenticationException: A call to SSPI failed, see inner exception.
16. System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () (at <9577ac7a62ef43179789031239ba8798>:0)
17. Mono.Net.Security.MobileAuthenticatedStream+<ProcessAuthentication>d__47.MoveNext () (at <aa976c2104104b7ca9e1785715722c9d>:0)
18. Rethrow as AggregateException: One or more errors occurred.
19. System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) (at <9577ac7a62ef43179789031239ba8798>:0)
20. System.Threading.Tasks.Task.Wait (System.Int32 millisecondsTimeout, System.Threading.CancellationToken cancellationToken) (at <9577ac7a62ef43179789031239ba8798>:0)
21. System.Threading.Tasks.Task.Wait () (at <9577ac7a62ef43179789031239ba8798>:0)
22. Mono.Net.Security.MobileAuthenticatedStream.AuthenticateAsClient (System.String targetHost, System.Security.Cryptography.X509Certificates.X509CertificateCollection clientCertificates, System.Security.Authentication.SslProtocols enabledSslProtocols, System.Boolean checkCertificateRevocation) (at <aa976c2104104b7ca9e1785715722c9d>:0)
23. System.Net.Security.SslStream.AuthenticateAsClient (System.String targetHost, System.Security.Cryptography.X509Certificates.X509CertificateCollection clientCertificates, System.Security.Authentication.SslProtocols enabledSslProtocols, System.Boolean checkCertificateRevocation) (at <aa976c2104104b7ca9e1785715722c9d>:0)
24. MySql.Data.MySqlClient.NativeDriver.StartSSL () (at <5bcfdf23711c4d2fa921347752c12a65>:0)
25. MySql.Data.MySqlClient.NativeDriver.Open () (at <5bcfdf23711c4d2fa921347752c12a65>:0)
26. MySql.Data.MySqlClient.Driver.Open () (at <5bcfdf23711c4d2fa921347752c12a65>:0)
27. MySql.Data.MySqlClient.Driver.Create (MySql.Data.MySqlClient.MySqlConnectionStringBuilder settings) (at <5bcfdf23711c4d2fa921347752c12a65>:0)
28. MySql.Data.MySqlClient.MySqlPool.CreateNewPooledConnection () (at <5bcfdf23711c4d2fa921347752c12a65>:0)
29. MySql.Data.MySqlClient.MySqlPool.GetPooledConnection () (at <5bcfdf23711c4d2fa921347752c12a65>:0)
30. MySql.Data.MySqlClient.MySqlPool.TryToGetDriver () (at <5bcfdf23711c4d2fa921347752c12a65>:0)
31. MySql.Data.MySqlClient.MySqlPool.GetConnection () (at <5bcfdf23711c4d2fa921347752c12a65>:0)
32. MySql.Data.MySqlClient.MySqlConnection.Open () (at <5bcfdf23711c4d2fa921347752c12a65>:0)
33. SQLManager.SetupSQLConnection () (at Assets/Scripts/SQLManager.cs:24)
34. SQLManager.Start () (at Assets/Scripts/SQLManager.cs:11)

And here is the code of my SQLManager script:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using MySql.Data.MySqlClient;
5.  
6. public class SQLManager : MonoBehaviour
7. {
8.     MySqlConnection connection;
9.     void Start()
10.     {
11.         SetupSQLConnection();
12.     }
13.  
14.     private void SetupSQLConnection()
15.     {
16.         if (connection == null)
17.         {
18.             string connectionString = "SERVER=server;" + "DATABASE=database;" + "UID=uid;" + "PASSWORD=password;";
19.             try
20.             {
21.                 connection = new MySqlConnection(connectionString);
22.                 connection.Open();
23.             }
24.             catch (MySqlException ex)
25.             {
26.                 Debug.LogError("MySQL Error: " + ex.ToString());
27.             }
28.         }
29.     }
30. }
31.  

Any ideas to how to solve this? I am very unfamiliar to all of this certificate stuff.
Thanks in advance.

 

bump