In the error log i see this:
{b}Err{/b}: on:22 oktober, 2015 12:08: 168.1.92.52: Unable to create session.
#0 wppa_log() called at [/xxx/hissen.se/public_html/wp-content/plugins/wp-photo-album-plus/wppa-session.php:65]
#1 wppa_session_start()
#2 call_user_func_array() called at [/xxx/hissen.se/public_html/wp-includes/plugin.php:503]
#3 do_action() called at [/xxx/hissen.se/public_html/wp-settings.php:353]
Sorry, http://www.fronda.se
The only change is that i have updated the WP to new versions during this period.
I know that the host have closed down some unused ports in the firewall. Could that be the problem?