Started to have a persistent crash as per the last @conbo9 comment in the comment section.
First occurred in the "Wreck havoc in the city center", where the player creates two squads. I decided to skip it, but the next one (Chosen assault on a haven) has the same problem.
Tried with different squad compositions, but the crash occurs even with frequently used before soldiers in basic gear.
Maybe the problem is that an enemy appeared with something missing and crashes the game?..
In-game date is April 26; Veteran difficulty.

Also, it's funny that when i loaded one of the previous saves and skipped one of the previously completed missions, the haven defend mission loads just fine. As if there is a limit on how many battles you can complete in a single campaign before it starts crashing xD

Here is a log

[0701.95] Warning: SeqAct_ActivateRemoteEvent CIN_SkyrangerIntros.TheWorld:PersistentLevel.Main_Sequence.SeqAct_ActivateRemoteEvent_3 failed to find target event: CIN_EndCapture
[0702.68] XCom_Event:

Validation Failure Summary (These event listeners have been REMOVED) :

[0702.69] Log: X2TacticalGameRuleset_CoordInt_0 CreateTacticalGame: End of Begin Block
[0702.69] Log: X2TacticalGameRuleset_CoordInt_0 PostCreateTacticalGame: BeginState
[0702.69] Log: X2TacticalGameRuleset_CoordInt_0 PostCreateTacticalGame: Start of Begin Block
[0703.13] Log: Crash Detected...