Snapshot fails with "Failed to copy box data files"

[hippalectryon-0]

What happened?

Taking a snapshot, deleting it and taking a snapshot again raises an error.

To Reproduce

• Create a new box
• Open notepad.exe and save a text file on the desktop. Close notepad. (goal: make the box non-empty)
• Snapshot Manager > Take Snapshot named "New Snapshot"
  • The snapshot is created
• Select the snapshot > Remove Snapshot > Yes
  • The snapshot diseappears from the list
• Snapshot Manager > Take Snapshot named "New Snapshot" (or "New Snapshot2", same error)
  • We get the error "Failed to copy box data files"

Expected behavior

We expect the snapshot to be taken (or the error to be explicit as to why it isn't taken)

What is your Windows edition and version?

Win10 Home 20H2 19042.1586

In which Windows account you have this problem?

A local or Microsoft account without special changes.

Please mention any installed security software

Windows Defender

What version of Sandboxie are you running?

SB-Plus 1.0.13

Is it a regression?

No response

List of affected browsers

No response

In which sandbox type you have this problem?

In a Standard isolation sandbox (yellow sandbox icon).

Is the sandboxed program also installed outside the sandbox?

Not relevant to my request.

Can you reproduce this problem on an empty sandbox?

I can confirm it also on an empty sandbox.

Did you previously enable some security policy settings outside Sandboxie?

No response

Crash dump

No response

Trace log

No response

Sandboxie.ini configuration

No response

Sandboxie-Plus.ini configuration (for Plus interface issues)

No response