I called Lastpass support and this is a known issue, introduced by 4.94 and it is being worked on. The only workaround is to open your vault and copy and paste from there til it is sorted .
Same here, on a Mac using safari it is a mess of a situation. Why do I need the app when I should just use the extension and be done?.
It fails to populate passwords, its icon on username and password fields conflict with native interface items and its own password prompt (both edge and safari's) , making it hard to activate the Last Pass icon on a field, as it sits on top of either the 'show password' icon, or the key icons for the browser's own password management.
A Lack of attention to detail, several updates without solving the very worrying state of the Mac problem stated here, 1password may be more expensive, but it works. I may take my business elsewhere.
Last night I switched to BitWarden. The BW free version works far better than LastPass without the UI issues @AntonioAcunaR mentioned above. The BW UI is a bit plain, but the utility is higher than LP.
I've been a LastPass Premium user for a long time, and I plan to pay for BitWarden if I don't see any issues in the next few days.
I'm having this same issue on a 2018 Mac Mini running macOS 12.3.1. The desktop app would also keep opening additional "tabs" even when the vault was open. I tried signing out and back in.
I do have the LP 2FA enabled using the LP Authenticator app.
I deleted the app and emptied the trash, but opening Safari still opened a LP blank window (but it seems to have stopped after a few more launches).
After reinstalling the desktop app, I opened it and the vault opened, but the app kept opening additional blank windows (annoyingly stealing my cursor focus).
I have tried signing out and back in and have the current 4.94.0 version of the app.
It seems to work fine in Edge and Chrome - just not Safari or the desktop app. It doesn't have this issue on Windows (although I can't run Safari on Windows any more since it's no longer supported).
Having the same issue as everyone else on here. Montery 12.3.1 Safari 15.4 & Lastpass 4.94. Safari extension just shows a blank box and I can never get rid of the box that prompts if i want to add a new password. Edge browser working fine
Removed LastPass and installed an old version, 4.88, and its working again.
Good idea to run an older version! Did a quick internet search and found an older version I could download for the Mac...4.86.
Uninstalled 4.94 and installed 4.86 and problem has disappeared. That blank pop up window that happens in 4.94 must be the 2 factor auth prompt...the same window popped up in 4.86 it was the same size, but wasn't blank and I was able to put in my 2 factor code.
I had forgotten that I had not entered a 2 factor for the 4-5 weeks I've been having this issue with the newest version.
I guess I'll just run 4.86 until there is a fix.
I just tried 1Password, and I think I'm going that direction. LastPass has been great, but the persisting horrible experience on Safari / macOS with the M1 MacBook is a deal breaker for me. Thanks for the many years of good service. Bye for now.