Bug on imputation

Hello,

Imputation works well except today and i don't understand why.
I have approximately 20 activities runnning. All was find before this thursday.

For this thursday, i enter 4 imputations on different projects.
I hit the record button.
I see the loader for 30 seconds (the rounded et turning thing) et nothing happened. The message saying the activities have been recorded doesn't appear and the 4 imputations have not been saved.

On the same day, imputations on activities for administrative project worked well.
No problem for the other days. No problem for my collegues.

Strange, isn't it !

This issue is still present today.
I tried on several computers, with several browsers

When the issue occurs, no error displayed on the browser
On the log of the adminsitration menu of porjeqtor, nothing special :

2019-03-22 09:02:09.642 ===== TRACE ===== Cannot check Version at projeqtor.org/admin/getVersion.php
2019-03-22 09:02:09.642 ===== TRACE ===== Maybe allow_url_fopen is Off in php.ini...
2019-03-22 09:02:12.970 ===== TRACE ===== DISCONNECTED USER 'admin'
2019-03-22 09:02:24.197 ===== TRACE ===== NEW CONNECTED USER 'admin'
2019-03-22 09:02:24.752 ===== TRACE ===== Cannot check Version at projeqtor.org/admin/getVersion.php
2019-03-22 09:02:24.752 ===== TRACE ===== Maybe allow_url_fopen is Off in php.ini...
2019-03-22 09:02:55.904 ===== TRACE ===== DISCONNECTED USER 'admin'
2019-03-22 10:34:20.580 ===== TRACE ===== NEW CONNECTED USER 'admin'
2019-03-22 10:34:26.127 ===== TRACE ===== Cannot check Version at projeqtor.org/admin/getVersion.php
2019-03-22 10:34:26.127 ===== TRACE ===== Maybe allow_url_fopen is Off in php.ini...

ok, but next week now

Hi again,

Error_log seems quite clear :

[Mon Mar 25 13:00:36.506908 2019] [:error] [pid 28117] [client 55.77.122.36:61675] 30 seconds exceeded in /var/www/html/projeqtor/model/PlanningElement.php on line 0, referer: l113301siepqtor.blabla.fr/view/main.php

I extended the max execution time to 45 seconds. What is your prescription for this php limit ?