Brave team member here. This was not a server issue but was a daylight savings time bug.
Is there a link or can you share more? Why would a DST bug prevent an app from opening at all?
In our case, we had a bit of code that aimed to measure the time until midnight/tomorrow. But when clocks change at midnight (jumping forward or backward), you can wind up with days that appear to be longer than 24 hours in length. And when a day is more than ~24hr in length, you wind up with unexpected answers to seemingly simple math equations.
A bit of logic, responsible for setting up a timer, wound up scheduling numerous timers when our 'How long until tomorrow' code began returning negative numbers. That set of unintended timers locked-up the application itself. You can see our issue for the behavior here: https://github.com/brave/brave-core/pull/11030.
For 10 minutes of anxiety, check out 'The Problem of Time & Timezones' from Tom Scott of Computerphile: https://youtu.be/-5wpm-gesOY. It's a fantastic summary of the issues programmers face when dealing with time :)
Sampson (Brave Team)
I apologize for my hasty comments. Based on the Reddit thread I had seen, it seemed most people were blaming a down server - and to a user, that's what it -felt- like too, seeing as there wasn't an app update or anything recent. I'm thrilled to hear that wasn't the case, and appreciate the explanation. Sounds like we're staying with Brave then!
Sampson (Brave Team)