What other mods are you running with Extinction Core? It could be possible that one of the mods is incompatible with the newest DLC patch.

Also, have you tried rolling back to the most recent save? Sometimes corruptions can happen, and rolling back to a previous save can fix these.

We tried a rollback the night the Extinction DLC came out, didnt work, and we added the mods over a 24 hour period, one by one after the DLC broke the server. It was a total wipe. CKmod, S+, Steampunk, GHG, Dino tracker, Dino-aid, Omnicular, the basics. Has anyone found a work around yet?

After you rolled back, did the engrams show up before you added any of the other mods? If they did, you may need to do the process again, loading each mod after to see which ones takes away the Extinction Core Engrams.

I also see that some of your mods (I have no clue what CK is) like Dino Aid and GHG Tranqs are very old. Maybe try replacing these mods with a mod that does the same thing, but is more recently updated.

I know Ark Advance 10 Tranqs tend to work well with Extinction Core Dinos, and although it was updated last year, the mod author is still active, and is even working on a new version of Ark Advance 10.

Also, you shouldn't need the Dino Aid mod. Extinction Core Has it's own way of healing dinos to full health (Blood Vials), and every dino has buffed healing when it's out of combat, so if you leave combat with a dino, you should be able to get back to full health within a few seconds.

Even when it was just the Extinction mod first and only the engrams vanished. Some on the server believe the Wildcard Devs did this, blocked the engrams out, to make it unplayable and make people play theirs. It's frustrating. But will remove dino aid and GHG and add Advance 10. I hope it works. Thanks Chess.

Removed all the mods, put Extinction mod first, added ark advance and its running great now. Thanks Chess..

Good to hear! Have fun with the mod!