hello, just been trying to sell my cfg and uh this keeps appearing, please help someone

[Niski123]

it keeps appearing everytime i try to do an action, either post my paid cfgs or even try to change my avatar, please someone help me im just tryna sell people a nice cfg for low money

 

[Niski123]

i cant post the image, it says the same error idk if its an browser issue or smth, it just keeps saying
Oops! We ran into some problems.
Oops! We ran into some problems. Please try again later. More error details may be in the browser console.

idk nothin bout programming so i dont understand what it says in the browser console, i cant post any images because its says the same things pls help