gaurav0 Do you happen to have a save from before the end of the Erosian War conversation with Esthera about the Erosian War's aftereffects? Preferably somewhere like just before talking to Iris after the catchup with all the harem members in the Fuck Palace?
I've seen this before and previously dismissed it as a byproduct of save editing, but I can't do that with a recurrence. The problem is that your save game is in a state that should not be possible naturally. You have both switch 3562: Research Blocked set to off and switch 2600: Research Available set to off without one of the switches for the various research projects being started set to on. What's supposed to happen is that Research Blocked gets set on or off after Riala briefs you on the effects of your Tower Front score, while Research Available gets set to on as long as Research Blocked is off by the Ch4 iterate event when you get returns from Megail.
Somehow that hasn't happened and I'd like to see if it does so consistently.
If it doesn't recur, I'm going to advise Sierra to edit Riala's research menu to quietly correct this scenario.
But I don't like that RPG Maker is apparently randomly fucking with game data or ignoring instructions if it feels like it.
In the meantime, if you want to continue your game by quietly using a save editor to turn switch 2600: Research Available back on, I'd not blame you.