Maybe It's the device? It works just fine on my tablet.
Well.... Think about again because I played with other visual novels and in the Immortal Justice (Appolyon Steel) on my Samsung galaxy s10+ couldn't load the Starry Night Sky imagine (in chapter 2) but on my older Huawei loaded it and I can continue it
And for me this visual novel has no problem but literally cannot load a picture on better phone in an other visual novel so yeah Samsung has a weird problem with visual novels (I tried to redownload it and restarted my phone too)