Biden passed a law in December that affects that form so the IRS and states are busy updating the forms and amended return procedures. You can use the form for your Sch E casualty loss as that is not related to the law change.
All the software has to be changed by the IRS and states, then we are allowed to update and file. Hopefully, it will be soon.
Please check forms availability here. Keep an eye on the amended date since those are linked.