each one opens fine Firefox!!! so the problem might be with 0.7.2 that 'wont understand' something of 0.7.1 sandboxies version Then with 0.7.2 I created a new sandboxie a Default, a Legacy and a Hardened one.

Then with 0.7.1 I created a the new sandboxie called BoxDev (the error appear here too)

The first comes from log ago, like when sandboxie classic version and worked fine with Sandboxie Plus 0.7.1 I had two sandboxies DefaultBox and BoxDev. Bitdefender Free version (tested with the protection turned off, too).System and installed software (please provide the following information): That Firefox 87.0 open normally as before with v0.7.2 I get the error popup Sandboxie Start window, saying 'could not invoque program.' some more text (in spanish like my windows).Also tried to first open a cmd (normal) and a cmd (admin) sandboxed, and executing from command line with the exe direcly.Right click on DefaultBox inside SandboxiePlus Panel, Run, Run Web Browser.After installing v0.7.2 I get the 'Could not invoke program' when trying to open Firefox.

Sandboxie imvu