Board Thread:Questions and Answers/@comment-24586130-20171201005710/@comment-33703237-20171213230558

I think it's due to your RAM.

As the game add new contents, it'll use more and more storage but also RAM

I read that in the beginning you could play on FGO Japan with 1GB RAM, now they need at least 2GB RAM.

For FGO NA, they began the game with the graphic update of the JA version (so you'll need at least 2GB RAM).

Maybe you could play 'till now 'cause you wasn't far in the story (so less data) but as you came to finish Okeanos,

now the game needs more RAM for the additional content.

Before running the game, it would be wise to clean your RAM (close all other apps), and see how much RAM you still have with everything close.

My previous phone had 4GB RAM, but 2GB were constantly used by other apps & phone system (but I could play without trouble).

So, I saw your LG has only 1,5GB RAM, if you only have 1GB RAM after cleaning, maybe you still can play the game, but less than that ... I don't think it'll open and even so it'll crash.