Error: Array to string conversion

[famousmag]

Marcos there was a suggestion/solution from @patrick…
It worked for me.
Please check if works for you also

500 Internal Server Error when updating subtable / form repeat

Still have to fix this, but I found a workaround for now. When you double click the column with the sub table it opens a dialog with the insert query for that sub table, just click ok there and it will save the correct data.