I have LegacyFamilyTree version 8. I tried importing my own genealogy and received the same error messages. "No value given for one or more required parameters." and then the database was empty. I import directly from RM7 but I initially tried using a GEDCOM file which also worked. There are always differences between products when using GEDCOM so some data may be lost but you could try that and see if all your data imports correctly.
It appears that this happens for only this person. I did a descendant narrative from 4 generations back and this was the only anomaly. The family group sheet looks just as it should. The individual summary also looks as it should. There is a misspelling in the sentence but all my facts do not show this sentence structure. Can I search all facts for a particular sentence wording or do I need to go to SQLite tools?