Gallery and other plugins were updated before the upgrade.
php version 5.3.8
OpenSSL enabled and version 0.9.8e-fips-rhel5 01 Jul 2008
I receive the following warning messages below at the top of each page. I restored a tarball of the previous installation and am now back to the pre-upgrade version, with no error messages.
I saw that lima2018 posted the same error messages in the thread
https://forum.dokuwiki.org/thread/14483 (about black screen from old Gallery plugin)
Warning: openssl_encrypt() [function.openssl-encrypt]: Using an empty Initialization Vector (iv) is potentially insecure and not recommended in /...dokuwiki/vendor/phpseclib/phpseclib/phpseclib/Crypt/Base.php on line 1017
Warning: Cannot modify header information - headers already sent by (output started at /...dokuwiki/vendor/phpseclib/phpseclib/phpseclib/Crypt/Base.php:1017) in /...dokuwiki/inc/auth.php on line 1233
Warning: Cannot modify header information - headers already sent by (output started at /...dokuwiki/vendor/phpseclib/phpseclib/phpseclib/Crypt/Base.php:1017) in /...dokuwiki/inc/actions.php on line 210
Warning: Cannot modify header information - headers already sent by (output started at /...dokuwiki/vendor/phpseclib/phpseclib/phpseclib/Crypt/Base.php:1017) in /...dokuwiki/lib/tpl/dokuwiki/main.php on line 12
Thanks for any suggestions.
Richard