OK ~Z~ Man.

Thanks for the information.

Actually, a lot of these languages which are not part of core Ossn are fairly outdated, incomplete, etc.
They were uploaded a long time ago but the contributors did not update them.

If you could complete Hungarian, we'd very much appreciate that.

Yes, problem solved. Incorrect translation.

Did you use that language archive from
https://www.opensource-socialnetwork.org/component/view/2779/hungarian-translation

?

Incorrect notification, I will correct, thank you very much.

In Hungarian and version 5.6 of OSSN. I'll see if this could be a mistake. Not good notification: 850 * 300.

That's strange.
The only English error message I can find in Ossn 5.6 and which comes close to yours is:

The cover picture must be at least 1040 x 300 or greater.

So: Which Ossn Version and language are you using? Or did you apply your own translation?