Yiota Ziaggou wrote: Do you use a third party plugin/extension? Try to Disable them one by one and check again.

i don't know what you do you thinking of ?
i disable JCE, Simple Im.gallery, allvideo... something more ?

Sent me access to your backend to check it out.

Make sure you have taken a fullsite backup since I might re-install K2.

Yiota Ziaggou wrote: Sent me access to your backend to check it out.

Make sure you have taken a fullsite backup since I might re-install K2.

ok - i sent
regarding backup - it is my test site and i thing that it will be my final version but i have to work but for now i cant run it finally

OK. I will just take a look and won't try to install anything then, just in case.

Thank you for the access.

Could you tell me what items are you trying to delete? Are there under a specific category?

ok - and backend link : brzozowiana.pl/portal/administrator

brzozowiana.pl is now active version of my site but i want to change it to j.3 and new template...

Do you have a specific category which items are you trying to delete?

Yiota Ziaggou wrote: Do you have a specific category which items are you trying to delete?

i try to dell almost all articles and import them once again... almost meat that i do not want to dell demo themes articles - this which has english titles

Could you please re-enable the account?