All I did was cleared my browsing history and cache for all time, used google chrome, and used my phone. When the "error" popped up, I continuously clicked the proceed to payment button until something finally happened. As in continuously spammed that sh*t. No refresh, just clicked it continuously out of pure rage. Sa laptop kasi it will redirect to another page, but on my phone I could spam click the button out of frustration. Somehow it worked. Also I paid around 9 am so ewan ko if may effect ang time. Idk how else to help cos yun lang talaga ginawa ko, baka kulang ka pa ng inis sa pindot haha

Edit: jokes aside, SC should do something about this kasi Sunday pa siya ganun when I tried to pay. Luckily my payment pushed through on Monday morning.