You could try the forgot password link. Also try logging in using a different browser and incongnito mode. Try also clearing your cache. If you still have problems then try contacting a moderator.
Moderator can be reached at
I would recommending messaging the kind folks at the Moderator_Team via this link to investigate your account and to provide some additional insight into your issue.
It helps to provide a detailed description of your problem and what your resolution goals are so they can best assist. If you are having troubles contacting the Moderator_Team, refer to the following knowledge base link.
Moderator hours are as follows and generally you can expect a response within 1 hour or up to 48 hours depending on volumes...
Best of luck!
@Phi-Khanh76Can you give us a screen capture or the exact phrasing of the error message? We are all customers here, so we can't see what you are doing.