My top at-a-glance eye-roller says "technical co-founder quit & pulled the code out from under me".
So completely neglectful of basic business structuring that the tech co-founder could just walk away with the code, to which you don't have copyright claim? If a non-technical co-founder can't even bring responsible management to the table, why are they at the table?
Article goes on to suggest that if the non-technical co-founder had learned to code so as to not feel so helpless, things would have gone better. Just wow.