Failed to load/Can't find file

Hello, I can’t package my game for Steam that I have been working on for 5 months. I get this errors alongside with others. Please help me solve these errors:
PS.

  1. I have upgraded the project from 4.14 to 4.17
  2. I also tried to package it on 4.18 - didn’t work
  3. Some of the files that can’t be found exist
  4. Other files… I don’t know anything about those files, I don’t have them on the scene, they were a part of some experimental free model from the internet that I used for prototyping. I don’t need them and can’t recover them. UE never told me not to delete junk assets. Does that mean my game is destroyed?
  5. I told UE to pack only objects that are present ON SCENE. So wtf? Why does it care about something that was deleted?
    UATHelper: Packaging (Windows (64-bit)): Cook: LogMaterial: Warning: Failed to compile Material /Game/ProjectAlpha/Highlights/ExampleContent/Blueprint_Communication/Materials/M_Highlight.M_Highlight for platform PCD3D_SM5, Default Material will be used in game.
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’: Can’t find file ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘…/…/…/…/…/…/Users/User/OneDrive/Documents/Unreal Projects/ShooterGame 4.17/Content/ArchVis/Mesh/SM_Bowl_DM.uasset’: Can’t find file for asset ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’ while loading …/…/…/…/…/…/Users/User/OneDrive/Documents/Unreal
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’: Can’t find file ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘…/…/…/…/…/…/Users/User/OneDrive/Documents/Unreal Projects/ShooterGame 4.17/Content/ArchVis/Mesh/SM_Bowl_DM.uasset’: Can’t find file for asset ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’ while loading …/…/…/…/…/…/Users/User/OneDrive/Documents/Unreal
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’: Can’t find file ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’: Can’t find file for asset ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’ while loading NULL.
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’: Can’t find file ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’: Can’t find file for asset ‘/Game/ArchVis/Materials/M_Ceramic_Mat_Inst’ while loading NULL.
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘/Game/grass’: Can’t find file ‘/Game/grass’
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘…/…/…/…/…/…/Users/User/OneDrive/Documents/Unreal Projects/ShooterGame 4.17/Content/NewFoliageType_InstancedStaticMesh.uasset’: Can’t find file for asset ‘/Game/grass’ while loading …/…/…/…/…/…/Users/User/OneDrive/Documents/Unreal Projects/ShooterGame
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘/Game/grass’: Can’t find file ‘/Game/grass’
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘…/…/…/…/…/…/Users/User/OneDrive/Documents/Unreal Projects/ShooterGame 4.17/Content/NewFoliageType_InstancedStaticMesh.uasset’: Can’t find file for asset ‘/Game/grass’ while loading …/…/…/…/…/…/Users/User/OneDrive/Documents/Unreal Projects/ShooterGame
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘/Game/grass’: Can’t find file ‘/Game/grass’
    UATHelper: Packaging (Windows (64-bit)): Cook: LogUObjectGlobals: Warning: Failed to load ‘/Game/grass’: Can’t find file for asset ‘/Game/grass’ while loading NULL.

No help as always