@Lauren,
Apologies for the confusion, I just read your reply incorrectly - that’s my bad.
We just released an update to v0.58.16 which you can download from our website. Would you mind trying to install this version and seeing if the “blank window” issue persists? Let me know what you find.
@lebedeff,
Would you mind grabbing a screenshot of that error message? You can copy/paste images directly into this form’s editor.
Additionally, Kaspersky has been flagging us as malicious for a while now (false positive). We’ve been in contact with them to get our software whitelisted but communication has been slow. Another Community member @MediaBird had a way to whitelist Kaspersky per-update I believe, if you’d like to try that so you can at least get the most recent update 
https://community.brave.com/t/auto-updater-for-dev-builds-is-detected-as-trojan-by-kaspersky-antivirus/34917/7?u=mattches