I don’t see a screenshot in the second link, just a reddit page.
In any event, the error usually means that Obsidian can read-write to the vault location. What’s the vault’s path on disk? e.g. /Users/KIET/Documents/{VAULT-NAME}, etc.
I’ve seen this error recently myself. I keep my vaults in dropbox. I took a copy of the offending note and then closed and restarted obsidian. The note was still there with all the changes. I think it’s just a temporary glitch in the new version, but i could not get rid of the error message without restarting.
For posterity I’m writing this up.
I’ve downloaded a demo vault on an iDevice and when wanting to modify content, I’ve received this error message.
Since my device is jailbroken and the files in the demo vault were owned by root with the group mobile , the file permission issue was likely because Obsidian (which runs under the mobile user) does not have the necessary permissions to write to files owned by root .
Solution in my case involved cd-ing into folder and execution of sudo chown -R mobile:mobile .
Read and write permissions in my case stayed at 644.
From that point on, I had no issues auto-saving file content.