When opening the lastpass extension icon a blank transparent frame is generated where the log on screen would usually be.
Esc and re clicking brings up the expected window.
Also there is a binary component for the Lastpass extension which installs a binary version of the extension and is required to store files within Lastpass. This has a separate installer that is downloadable, however it doesn’t appear to install on Brave but does on my Chrome browser.
OS Release: 10.0.16299
Update Channel: Release
OS Architecture: x64
OS Platform: Microsoft Windows
Brave Sync: v1.4.2