Maybe the user is referring to a specific version of Vivo File Manager that was released to fix issues with Android 12. I recall that Vivo might have released an update to address compatibility issues with Android 12. I should search for "Vivo File Manager update Android 12". specific.
Easily finds hidden downloads and clears junk files safely. FV File Manager Vivo File Manager Android 12 Fixed Download
Once you install the fixed app, you still need to grant the proper access rights to keep it running smoothly: Maybe the user is referring to a specific