Hi. I know that the extensions are not strictly a part of Koha, but maybe someone can help me with this: I am using the Coverflow plugin and the additional "pages" template to use Koha as a CMS. These things worked for me in previous Koha versions but stopped working after the upgrade to 21.11: - The Coverflow is not showing (only the "loading ..." text is there). - The content of the custom pages is not showing. - There is no error message in the web console. - The opac-error.log shows me a repeated error about the use of an uninitialized value in the file /usr/share/koha/lib/C4/XSLT.pm, but I don't know if this error has something to do with my problem. What I did after the upgrade: - For Coverflow: I updated the Coverflow plugin to the latest version (2.5.0). - For Koha as a CMS: I overwrote the old file pages.pl with a copy of the new file opac-main.pl and followed the instructions for this file at https://koha-community.org/manual/21.11/en/html/extending_koha.html#using-ko... - For Koha as a CMS: I overwrote the old file pages.tt with a copy of the new file opac-main.tt and tried to follow the instructions for this file at https://koha-community.org/manual/21.11/en/html/extending_koha.html#using-ko..., but the line that has to be modified has changed, so here I don't know how to do it. But at least the content of my custom pages ought to appear without changing the template, I think that something must be wrong in the file pages.pl. Is there anybody who is using these extensions and can help me? Thank you very much. Isabel Pineda