I'm dealing with the exact same issue and have no idea how to troubleshoot it. As a temporary fix I've switched to native sessions, but since I have a few production web servers, it's not ideal.
Did you composer update today?
Its a known issue: https://github.com/laravel/framework/issues/4441
Set stability to stable to solve
Sign in to participate in this thread!
The Laravel portal for problem solving, knowledge sharing and community building.
The community