Today i update Piwigo to the last version.
I do get errors when i go to my website:

Notice: Undefined index: display_fromto in /home/historie-sliedrecht.nl/public_html/pwg/include/category_cats.inc.php on line 119

Notice: Undefined index: display_fromto in /home/historie-sliedrecht.nl/public_html/pwg/include/category_cats.inc.php on line 315

Warning: Cannot modify header information - headers already sent by (output started at /home/historie-sliedrecht.nl/public_html/pwg/include/category_cats.inc.php:119) in /home/historie-sliedrecht.nl/public_html/pwg/include/page_header.php on line 86

Can somebody help me out?

Kind regards
JOhn