Server error when trying to setup with raspberry pi 3 using the browser

[Steven1597]

when i try to press finish it start loading then comes up with server error and a bunch of text

System.Exception: Error in CreatingCloudServerManagementDatabase.sql: 22023: encoding "UTF8" does not match locale "en_AU" ---> Npgsql.PostgresException (0x80004005): 22023: encoding "UTF8" does not match locale "en_AU" at Npgsql.NpgsqlConnector.<>c__DisplayClass160_0.<g__ReadMessageLong|0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Npgsql.NpgsqlConnector.<>c__DisplayClass160_0.<g__ReadMessageLong|0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Npgsql.NpgsqlDataReader.<>c__DisplayClass41_0.<g__ReadMessageSequential|0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Npgsql.NpgsqlDataReader.NextResult(Boolean async, Boolean isConsuming) at Npgsql.NpgsqlDataReader.NextResult() at Npgsql.NpgsqlCommand.ExecuteReaderAsync(CommandBehavior behavior, Boolean async, CancellationToken cancellationToken) at Npgsql.NpgsqlCommand.ExecuteScalar(Boolean async, CancellationToken cancellationToken) at Npgsql.NpgsqlCommand.ExecuteScalar() at PostInstall.DBConnection.ExecuteScriptInternal(NpgsqlConnection connection, String sqlQuery, IDictionary`2 parameters) at PostInstall.DBConnection.ExecuteScript(String sqlQuery, IDictionary`2 parameters) at _3CXCloudDBManager.DbConnectionExtensions.ExecuteScript(IDBConnection connection, Object configurationStructure, String scriptText, Boolean asResourceName) Exception data: Severity: ERROR SqlState: 22023 MessageText: encoding "UTF8" does not match locale "en_AU" Detail: The chosen LC_CTYPE setting requires encoding "LATIN1". File: dbcommands.c Line: 740 Routine: check_encoding_locale_matches --- End of inner exception stack trace --- at _3CXCloudDBManager.DbConnectionExtensions.ExecuteScript(IDBConnection connection, Object configurationStructure, String scriptText, Boolean asResourceName) at _3CXCloudDBManager.CloudDBManager.CreateCloudServerManagementDatabase(IDBConnection superuser, CloudServerManagementDatabaseConfiguration configuration) at PostInstall.SetupExecutor.CreateCloudServerManagementDatabase(CloudDBManager cloudDbManager, DBConnection templateConnection) at PostInstall.SetupExecutor.CreateDatabase(Action`1 stateChanged) at PostInstall.SetupExecutor.ExecuteSetup(SetupSettings setupSettings, Action`1 stateChanged, Action`1 errorNotifier) at PbxWebConfigTool.PbxSetupService.CreatePbxInternal(SetupSettings settings)

 

[NickD_3CX]

There is a guide here, may I suggest you start over by followng the guide one more time?
https://www.3cx.com/docs/installing-pbx-raspberry-pi/