There are two separate and unrelated issues in the above posts. First, some users were not able to log into the web portal this morning. Several web servers had become un-responsive which caused a portion of users to not be able to log in. The API was not impacted. That was fixed and addressed shortly after the issue was reported.
The second issue was with a 422 error when trying to place an order via the API. This was due to the symbol being in lower case. Generally all symbols need to be in upper case. There is a feature request to not look at the case, but currently it generates this error. The fix is to ensure symbols are all upper case when submitting orders.