@leocg Thanks for the prompt reply. As was explained, there is no reset passphrase button on the sync.opera.com webpage.

However, the reset was already successful. What I didn't know was that I had to sign out of the browser for the reset to take effect. It turned sync on straight away upon signing back in; however, I now don't recall it asking me to create a new passphrase!

@leocg This is quite frustrating because I am having this same exact problem, but I do not see any answers anywhere, including here. I try to enable sync and am prompted for the passphrase. Since I can't figure it out, I click reset passphrase. I'm taken to the stupid video as shown above and there is no way to access the settings of which you mention. Every time I try to go into that setting area, I'm prompted for the passphrase I don't know, and clicking reset passphrase produces zero results.