Since a week ago I see the information of my vault in an unreadable format, I have tried with the safe mode without plugins and the same thing happens. I have installed earlier and later versions without success.
From the attached image, I think you are trying to open a “binary” file inside Obsidian. You haven’t mentioned what you are trying to open. Is this an MD file or something else?
However, the first line with AES/CBC/PKCS7Padding also suggests that this could be an encrypted file.
AES in CBC mode with PKCS7 padding is a standard encryption scheme.
My blind guess is that you’re trying to open Java file.
My next guess is that you or somebody else with access to your user account encrypted your notes/vault.
Encryption can originate from a plugin, some 3rd party app or through your operating system.
If other people have access to your account, please create a new account for other users and restore your account via backup, eg. Timer machine on Mac or TimeShift on Linux or similar tools for windows
This is not an Obsidian bug. You need to figure out who or what alerted you notes.
I don’t know if all your notes are like this or just this one. You can try using the File Recovery Plugin (in settings) to see if you can rollback to previous version.