First of all: Do you have a backup?
There is a thread here at Talk, that shows, how you can create a local backup file if you save mechanism does not work.
See: "Emergency Save" - How to Save a Wiki if the UI is Broken
It shows a mechanism, that works with the browser console.
- Can you “copy / paste” your file from the network drive using the File Explorer?
- If no, the file is probably locked, which can happen with network files.
- Worst case the file is corrupted.
- If you can copy paste the file to a local directory, try to open it from there.
- Open it in a browser
- Right click into the page - There should be a dialogue, that shows View Page Source
- Select it and have a look, if it looks OK – This only makes sense, if you know a bit about HTML source code.
Just some thoghts – And don’t for get backup first
Hope that helps
-Mario