"problem happens" is correct and usable in written English.
You can use it when referring to something that has gone wrong or is causing difficulty. For example, "A power outage occurred and now the computer is not working - problem happens."
oops my mistake hahahaha no problem — happens. .
Well, for many reasons, actually, like being scrutinized the wrong way (Ms. Tilly occasionally appears on Mr. Blackwell's Worst-Dressed list) or for having an unflattering picture taken that could appear in tabloids if a drug problem happens to occur.
"I think somewhere along the line I guess I just learned that how you got to whatever the problem happens to be isn't anywhere near as important as what you do about it," General Pace said.
"Frankly, Hillary brought up the whole thing with 'sexist', and all I did was reverse it on her because she's got a major problem, happens to be right in her house".
This may sound pretentious, but it's partly because over the last 20 years or so I've been to see a lot of free improvisational music – and I like that when a problem happens instead of trying to avoid it, or cover it up, they go with it.
The same problem happens all the time, perhaps with lesser consequences, throughout organisations.
The power problem happened this time as there was a drought-like situation in Haryana.
On radio 4 this morning the CEO of the trust was asked why the problem happened gave 3 reasons.
"Where the problem happened, I'm accountable, but I don't operate quite at that level," Mr. Armstrong said.
XFEM is becoming more and more popular with the need of solving the discontinuous problem happening in engineering field.
But they lacked context about what was happening on the phone when the problem happened.
