bug after upgrade from 4.9 to 5.4.3

Hi Emir,
In additon when i trun sef advance off url such as
www.babyhold.com/index?option=com_conten...view&id=126&Itemid=1

or even
www.babyhold.com/?option=com_content&task=view&id=126&Itemid=1

could go the appropriate article

however with the new versiobn i get a 404 sef error. Now i can fins it myself and in the meanwhile search engibes are detecting all urls as wrong. I will appreacie if you could help me with this matter as soon as you can.

I can't even go back to the old sef version in the meanwhile as i dint have it.

Thanks,
Alon

The internal URL should always be defined as index.php?option=...
I don't see why you would need support for index?option=... or /?option=... and such links were never intended to be translated to SEF URLs.

So it's was always needed to be index.php?option=... If anything else worked it was by error. So please convert your links to proper format.