[pmwiki-users] problem with uploaded pictures

[Piotr Dybczyński]

Hi all,

after upgrading PmWiki to version 2.3.27 under Debian 11 (PHP 7.4) I 
cannot see any previously uploaded pictures nor upload new ones.

When trying to display, in Firefox I read (unfortunately in Polish):

Obraz 
„https://apollo.astro.amu.edu.pl/PAD/pmwiki.php?n=Wikicomet.Oumuamua?action=download&upname=startrek_30_1b.png” 
nie może zostać wyświetlony, ponieważ zawiera błędy.

It means: the picture ... cannot be displayed because it contains errors

When trying to upload, I see:

  Token invalid or missing.

Can anybody explain how to fix this?

Thanks in advance,
Piotr
-- 
/************************************************************************
                          dr Piotr A. Dybczyński
  homepage: https://www.dybczynski.pl/Piotr   e-mail: piotr at dybczynski.pl
******************************************************************PAD***/