email synchronization

[peterberlin]

Hello,

we have a problem in our version 5.6.14

:
E-mails sent in Espo are no longer synchronized with the selected folder in the local client (Thunderbird).
The import of e-mails into ESPO works.
There are entries in the log file that we do not understand.

[2020-03-04 10:39:03] Espo.DEBUG: BPM: processPendingFlows [] []
[2020-03-04 10:40:01] Espo.WARNING: E_WARNING: A non-numeric value encountered {"code":2,"message":"A non-numeric value encountered","file":"/var/www/html/crm/vendor/mtdowling/cron-expression/src/Cron/AbstractField.php","line":94,"context":{"dateValue ":"40","value":"/2","parts":["","2"],"stepSize":"2","range":[""],"offset":"","to":"40","i":0}} []
[2020-03-04 10:40:01] Espo.WARNING: E_WARNING: A non-numeric value encountered {"code":2,"message":"A non-numeric value encountered","file":"/var/www/html/crm/vendor/mtdowling/cron-expression/src/Cron/AbstractField.php","line":94,"context":{"dateValue ":"41","value":"/2","parts":["","2"],"stepSize":"2","range":[""],"offset":"","to":"41","i":0}} []
[2020-03-04 10:40:01] Espo.WARNING: E_WARNING: A non-numeric value encountered {"code":2,"message":"A non-numeric value encountered","file":"/var/www/html/crm/vendor/mtdowling/cron-expression/src/Cron/AbstractField.php","line":94,"context":{"dateValue ":"42","value":"/2","parts":["","2"],"stepSize":"2","range":[""],"offset":"","to":"42","i":0}} []
[2020-03-04 10:40:02] Espo.WARNING: E_WARNING: A non-numeric value encountered {"code":2,"message":"A non-numeric value encountered","file":"/var/www/html/crm/vendor/mtdowling/cron-expression/src/Cron/AbstractField.php","line":94,"context":{"dateValue ":"40","value":"/2","parts":["","2"],"stepSize":"2","range":[""],"offset":"","to":"40","i":0}} []
[2020-03-04 10:40:02] Espo.WARNING: E_WARNING: A non-numeric value encountered {"code":2,"message":"A non-numeric value encountered","file":"/var/www/html/crm/vendor/mtdowling/cron-expression/src/Cron/AbstractField.php","line":94,"context":{"dateValue ":"41","value":"/2","parts":["","2"],"stepSize":"2","range":[""],"offset":"","to":"41","i":0}} []
[2020-03-04 10:40:02] Espo.WARNING: E_WARNING: A non-numeric value encountered {"code":2,"message":"A non-numeric value encountered","file":"/var/www/html/crm/vendor/mtdowling/cron-expression/src/Cron/AbstractField.php","line":94,"context":{"dateValue ":"42","value":"/2","parts":["","2"],"stepSize":"2","range":[""],"offset":"","to":"42","i":0}} []
[2020-03-04 10:40:08] Espo.DEBUG: Google Contacts:Error after requesting GET https://www.google.com/m8/feeds/groups/default/full. [] []

peter