I got this error when trying to advance into day 30. Currently using the android port. Log and pic included if it helps.
View attachment 3499713
Uncaught Error: Header is wrong: img/pictures/ed_結衣.png | undefined
I was able to get rid of this error by doing the following on Android.
1. Make a copy of your save file folder and backup it somewhere. "SummerMemoriesMainFolder/www/save"
If you imported it in JoiPlay it might be located in "JoiPlay/SomeRandomGameIdMadeUpOfNumbers/www/save"
2. Download Maldives Player (RPG MV/MZ)
3. Extract the game you downloaded from F95 into a folder besides "Downloads" (I used RAR for Android)
4. Open Maldives and import the game by selecting the main folder.
5. Copy the save folder into your extracted copy of the game
6. Open the game in Maldives and confirm that the save files are loading
Now you should be able to proceed to the last day.
As soon as you can save again, save and import the copy of Summer Memories into JoiPlay or move the new save file into your previous existing save file folder.
After this I was able to play smoothly again.