Sometimes, the Filer Type dropdown menu on the Fees tab may not load properly. If a filer attempts to continue filing when this happens, they may receive the following error message:
"An error occurred calculating fees: Failure Reason(s): 133 - One or more errors occurred during GetFeesCalculation: [133] FilerTypeText is empty, this is a required element."
When this occurs, save your draft, then exit out of the website altogether. Once done, log back in and try to load your draft again.