I know there's an older post for this topic but thought I'd refresh it.

Like several others I got up to Korriban, got the datapad and finished the Sith Academy, it says to speak with T3-M4 but I have no options for it. And subsequently it doesn't appear on the galaxy map.

Here's a list of my mods for reference, starting with Steam workshop mods:

• TSLRCM (English) + M4-78EP (English)
  
• Choose Mira or Hanharr (for TSLRCM)
  
• High Quality Skyboxes II
  
• High Quality Blasters
  
• No Lightsaber Quest (for TSLRCM)
  
• Prydeless’s Pink Lightsaber Mod
  
• Ebon Hawk Re-Texture INTERIOR ONLY
  
• Effixian’s T3 Blue Reskin
  
• Effixian’s Jango Mandalore
  
• Peragus Large Monitor Adjustment
  
• Effixian’s Scoundrel Jacket (Male Only) (R)
  
• Effixian’s Black Underwear

Deadlystream and Nexusmods (I’ll specify with DS or NM where the mod came from):

• Atton Rand and Male Exile Romance (from DS)
  
• T3-M4 Lightsaber Construction Mod 1.1.0 (from DS)
  
• PartySwap 1.3.3 (from DS)
  
• A Darker Peragus REDUX 1.0 (from DS)
  
• PMHC06 – Scruffy Nerf-Herder Reskin 1.0 (from DS)
  
• Atton Rand with scruff 1.0 (from DS)
  
• Peragus Mining Gear 1.01 (from DS)

I've done a little bit of digging myself and I don't believe the Ebon Hawk re-texture mod or the T3 reskin mods are the issue (uninstalling them didn't fix the bug). I haven't tried uninstalling the T3 lightsaber mod yet, what I assume would be the other mod most likely to cause a bug here but not really sure. Also not opposed to re-installing TSLRCM but just curious if any in the above list immediately stands out as what might've caused an issue here.

Also unrelated, but thanks so much to Hassat and the others who've worked hard on this! Playing TSLRCM up till this point has been so much fun.