cjab

Thank you, David. Indeed, consider the problem as solved.

Thank you, David. I will try it.

Thank for your answer, David. And sorry for my vagueness. Your guess is correct : “Regenerate Thumbnails” version 2.2.6 by Alex Mills (Viper007Bond).

thank’s for answering
I did as you asked

Preliminary reminder :
I talk about login/logout problem which occurs when WP_DEBUG is ON
(with WP_DEBUG off, there is no visible problem, ok ?)

Tests :
1) tested with a custom theme and with the default “twentyfifteen” theme (1.3)
2) tested plugin by plugin
3) the same problem on both themes
–notice–
4) with all plugins but Full Calendar = login/logout works fine
5) with all plugins but Event Manager = login/logout works fine

Conclusion :
the issue seems to come from the cohabitaion of Event Manager (5.6.1) and Full Calendar (1.0) used to show events from Event Manager

if you need details about environnement, configuration, notices and warnings, I can send it

Impossible to login with WP FullCalendar + WP_DEBUG turned on !
– “Undefined index: type in /…/wp-content/plugins/wp-fullcalendar/wp-fullcalendar.php on line 53”
(“Cannot modify header information – headers already sent by /…/wp-includes/pluggable.php on lines 935, 936, 937, 1207)

WP 4.3.1
Event Manager 5.6.1
FullCalendar 1.0

and the same probme here ??
Notice : on localhost there was no problem with updating.

WP 4.3.1 + WP User Avatars 0.1.4

Non, it’s not the problem of WordPress Address/Site Address, and I posted here after disabling all plugins and activating the default theme, ok ?

By guesswork, the quack come from the http header and lay in usermeta table.

Topo:
it’s a dev website having a rather special loads in booklet, so I’ve tested the coexistence of various plugins BEFORE cloning already developed content with selected only plugins…

As we know, the suppression of plugins doesn’t always clean up the db correctly… especially when plugins relate to user management.

The irony : the problem is absent from the “dirty” dev original !