the game wont let me make a new save with new addons

[Lord Pissage]

An error has occurred. If you continually get the same error, try loading a different save file, submit a bug report, and/or check the Support Forums for assistance.

POSTAL 2 Build Apr 20 2018 01:08:49

OS: Windows NT 6.2 (Build: 9200)
CPU: GenuineIntel PentiumPro-class processor @ 2309 MHz with 4095MB RAM
Video: Intel(R) UHD Graphics 630 (6287)
Level: Startup.♥♥♥ - Untitled

Assertion failed: InPos<=Size [File:D:\POSTAL2\POSTAL2PL\Core\Inc\FFileManagerWindows.h] [Line: 57]

History: FArchiveFileReader::Seek <- ULinkerLoad::Seek <- LoadImportMap <- ULinkerLoad::ULinkerLoad <- UObject::GetPackageLinker <- (Engine.LevelSummary cus-ProjectMaricaCity.LevelSummary NULL) <- UObject::StaticLoadObject <- (InteractionMaster Transient.InteractionMaster0, Function Engine.InteractionMaster.Process_KeyEvent) <- UObject::ProcessEvent <- UInteractionMaster::MasterProcessKeyEvent <- UEngine::InputEvent <- UWindowsViewport::CauseInputEvent <- UWindowsViewport::UpdateInput <- UViewport::ReadInput <- APlayerControll

[Running With Scissors [S]]

What happens when you try to save?

[Lord Pissage]

The game crashes

[Lord Pissage]

I tried to make a new game but it crashed again and it won’t let me send the bug report