My documents are missing link information for embedded images, as shown in screenshot. The images are stored in a folder on my computer and haven’t been copied from elsewhere. This issue never occurred before does anyone know how to fix it?
If really Embedded - you should rather not do this.
Probably, because of Embedding instead of linking - your file got corrupted - try IDMLing - export as IDML, open, save with a new name - do not overwrite your original file.
Can you - even just for fun - UNembed them - make them linked again, then save your document with a NEW NAME? What's the size of your new INDD file?
And if you prefer to keep them embedded - please do SAVE AS with a NEW NAME at least at the end of the day - you'll greatly reduce the risk of future corruptions.
Of course, the next day, you will have to work on this new copy - or rename it, but then keep a copy of it somewhere safe anyway.