"Potřebuju lepšího bratrance."

Translation: I need a better cousin.

[MiguelSala13]

The form potřebuji should also be accepted.

[kacenka9]

it is

[AlenaBuluskova]

Potřebuji - stále neakceptováno.

[endless_sleeper]

Potřebuji has been among the accepted variants for more than a year. Maybe it's a Duo bug. Please report it appropriately, screenshot included, the next time it happens.