Trying to amend an earlier return ('18), I get two reference codes 5-005-466 and 3-451-977 and 1040X error that my "calculations could not be completed. Any ideas?

`I had short term capital losses from trading cryptocurrency during 2018.  TokenTax provides details on ALL trades and produces a form 8949 with bottom line I can enter into my return.  2019 TurboTax accepts the data, but I don't know how to correctly update my 2018 return to show the info.  The online TurboTax app throws the errors above.