While making a purchase from the mobile app on OLX, an error occurred that doesn't indicate its cause.
Під час обробки транзакції сталася помилка (OLX)
I tried to repeat the purchase from a computer and received a message that at least says something. In your case, it might be a different error. But the fact is - from the computer, we see more info than from the mobile app.
Monthly purchases count of root category "Електроніка" exceeded
Error message:
Monthly purchases count of root category "Electronics" exceeded
And the most interesting and not very obvious thing is that the buyer has limits on making purchases in categories. I have already made seven purchases in the "Electronics" section (OLX delivery) and the eighth one is not going through.
What to do about this is not very clear. OLX documentation talks about limits and purchasing additional slots only for sellers.
So currently, to solve a similar problem when you need to buy many items in one category: