"Jooan cameras and DVRs typically use a default username of admin with a blank (empty) password. If that does not work, try 123456 or check the sticker on the device for unique credentials. For forgotten passwords, you must perform a factory reset by holding the reset button for 10–15 seconds."

Popravdě moc nevím, tu kameru neznám, ale zkoušels kameru resetovat do továrního nastavení? Možná reinstalovat i tu aplikaci?...