Probably because for the development stage they racked up such a massive debt they are collapsing under that weight.

Nope: looking at the linked filing, their sales and marketing is about half of their operating expenses. This includes sales and marketing direct cost, employees and stock options. Seems like they spend a lot of their budget there. And when their subscription income fell they need to follow suit. This was seen coming from a mile away.

https://www.sec.gov/ixviewer/ix.html?doc=/Archives/edgar/data/0001660134/000166013423000068/okta-20231031.htm