As the export has gone into invalid state, to resolve the situation, concerning export has to be deleted.
Export can be deleted in either of elow methods:
If you are able to open Model Settings > Actions, delete the offending action. To do this, you will need to select any export action without letting offending action appear in screen, then hit Delete. Keep the selected export (move from rhs to lhs) and delete the offending action by moving it from lhs to rhs and click “OK”
Restore to serial before the error.
If this workaround is not suitable in your use case, please contact Support at firstname.lastname@example.org.