"The Current version is invalid" error

[Schemea]

I've set up a very basic scene which had been working fine until this morning, but when I run the simulation now, the characters do not move (just plays the walk animation loop on the spot), and I see green message on the top left saying "The current version is invalid".

I've made a new level to start fresh and even a new project, but nothing worked. I've also uninstalled and installed Miarmy plugin, but it didn't work either.

Here is a part of the log that seemed relevant:

LogWorld: Bringing World /Game/UEDPIE_0_Main.Main up for play (max tick rate 0) at 2024.01.01-11.51.27

LogWorld: Bringing up level for play took: 0.005540

LogOnline: OSS: Created online subsystem instance for: :Context_13

LogGameMode: FindPlayerStart: PATHS NOT DEFINED or NO PLAYERSTART with positive rating

LogActorComponent: Warning: SetAutoActivate called on component MiarmyEditorTickPMComponent /Game/UEDPIE_0_Main.Main:PersistentLevel.red_guy_OA_C_9.MiarmyCache after construction!

LogActorComponent: Warning: SetAutoActivate called on component MiarmyEditorTickPMComponent /Game/UEDPIE_0_Main.Main:PersistentLevel.red_guy_OA_C_10.MiarmyCache after construction!

LogActorComponent: Warning: SetAutoActivate called on component MiarmyEditorTickPMComponent /Game/UEDPIE_0_Main.Main:PersistentLevel.red_guy_OA_C_11.MiarmyCache after construction!

LogActorComponent: Warning: SetAutoActivate called on component MiarmyEditorTickPMComponent /Game/UEDPIE_0_Main.Main:PersistentLevel.red_guy_OA_C_12.MiarmyCache after construction!

LogActorComponent: Warning: SetAutoActivate called on component MiarmyEditorTickPMComponent /Game/UEDPIE_0_Main.Main:PersistentLevel.red_guy_OA_C_13.MiarmyCache after construction!

LogActorComponent: Warning: SetAutoActivate called on component MiarmyEditorTickPMComponent /Game/UEDPIE_0_Main.Main:PersistentLevel.red_guy_OA_C_14.MiarmyCache after construction!

LogActorComponent: Warning: SetAutoActivate called on component MiarmyEditorTickPMComponent /Game/UEDPIE_0_Main.Main:PersistentLevel.red_guy_OA_C_15.MiarmyCache after construction!

LogActorComponent: Warning: SetAutoActivate called on component MiarmyEditorTickPMComponent /Game/UEDPIE_0_Main.Main:PersistentLevel.red_guy_OA_C_16.MiarmyCache after construction!

LogActorComponent: Warning: SetAutoActivate called on component MiarmyEditorTickPMComponent /Game/UEDPIE_0_Main.Main:PersistentLevel.red_guy_OA_C_17.MiarmyCache after construction!

PIE: Server logged in

PIE: Play in editor total start time 0.086 seconds.

Any input would be appreciated. Thank you!