Issues with Bitcoin Core 25.0 wallet backup on Windows 11

Just got this error: "A fatal error has occurred. Bitcoin Core can no longer continue to run safely and will soon exit." Anyone else facing this problem? What’s the deal with it?

Most probable reason is your wallet.dat file corrupted. Replace the corrupted wallet.dat file with your backup. Even if it persists after replacing wallet.dat file then try this

Check the logs if there's any related issue in the last few lines. Or you can post it here inside [code][/code] tags for others to check, You do not have to post the entire thing, just the latest session and you can remove PC username, etc. if you prefer. You can find your debug.log file in %appdata%/bitcoin (paste to File Explorer) or in your custom data directory if set. Open it as text to see the contents. For now, you can manually backup your wallet by copying it from "wallets" folder inside bitcoin data directory. Either the entire folder that has the same name as your wallet or the 'wallet.dat' inside it. Make sure that Bitcoin Core isn't running while copying the wallet file.

Unfortunately, nothing in log tells the cause of the issue. That'll make things harder to check. I can only suggest to test a few things: Are those "test" and "test1" wallets created normally? Is it crashing when backing up 'test1' wallet only or both? Try to create another wallet and try if it'll also crash when you backup. Try another directory to save the backup wallet file.

I succeeded when trying your last suggestion, I looked at the log, there were Chinese characters in my storage path, it turned out that Bitcoin Core did not recognize Chinese, thank you very much!