Error buy Group Forum

When I buy a group forum it gives this error, does anyone know how to solve it?
01:29:55 - [ERROR] Exception:System.FormatException: The input string was not in a correct format.em System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)em System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)em System.Convert.ToInt32(String value)em Plus.Communication.Packets.Incoming.Catalog.PurchaseFromCatalogEvent.Parse(GameClient Session, ClientPacket Packet) na C:\Users\User\Desktop\Plus Emulator - Release 2\Emulator Source\Communication\Packets\Incoming\Catalog\PurchaseFromCatalogEvent.cs:line 268em Plus.Communication.Packets.PacketManager.TryExecutePacket(GameClient Session, ClientPacket Packet) na C:\Users\User\Desktop\Plus Emulator - Release 2\Emulator Source\Communication\Packets\PacketManager.cs:line 154em Plus.HabboHotel.GameClients.GameClient.parser_onNewPacket(ClientPacket Message) na C:\Users\User\Desktop\Plus Emulator - Release 2\Emulator Source\HabboHotel\GameClients\GameClient.cs:line 66

What emulator are you using? (Include build)

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Originally Posted by Zoxq

What emulator are you using? (Include build)

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Plus Emulator Release 2
But my emulator has the forum groups fixed

Hi there!

Which system format are you using on Windows? I recommend to use English (American).

HOW?

1. Open the Regional and Language Options applet from the Control Panel.
2. Note the Current Format.
3. Change the Current Format to English (Australian)
4. Click Apply.
5. Change the Current Format to the noted format, eg, English (American).
6. Click Apply and then click OK.

More information: https://support.microsoft.com/en-us/...eric-data-type