I'm facing a strange error upon a new customer creation using the WHMCS module.
I can't find no log in WHMCS or on i-MSCP Server. The only thing I have is the response in the WHMCS Module Queue:
Debian 9 Stretch with default php 7.0 (with FPM) and MariaDB 10.1 using i-MSCP 1.5.3 (2018120800)
Additional Plugins: ClamAV, LetsEncrypt, Mailgraph, Monitorix, OpenDKIM, PhpSwitcher, Postscreen, RoundcubePlugins, ServerDefaultPage, SpamAssassin, WHMCS
Debian 9 Stretch with php 7.1 (with FPM) and MariaDB 10.1
WHMCS 7.7.1 General Release
i-MSCP Server has been recently upgraded from Jessie and php 5.6, to the specs written above.
Please could someone give me some hint on how I can debug the problem ?
There's no WHMCS log (I can see all the Others Plugin logs, but not for WHMCS).
I Can see the request incoming in i-MSCP when looking at /var/log/nginx/access.log
But unfortunately no further informations.
Any help is appreciated.
Thank you very much,