Error on payment input

Hi,

since I upgraded to 7.0.3 version, I can’t enter payment anymore.
I have an issue in the last step after validating the yellow message (fully paid invoices will be closed)

La pièce jointe Greenshot2018-07-2616.41.23.png est absente ou indisponible
And then an error 500, and the payment is not entered.
La pièce jointe Greenshot2018-07-2616.40.22.png est absente ou indisponible

Is their a known issue related ?

Thanks
Pascal

Trace is :

2018-07-26 16:47:52 INFO 80.215.138.12->80.215.138.12 functions.lib::dol_mkdir: dir=/home/topvilla/www/ctrlit/ctrlop/documents/admin/temp/
2018-07-26 16:47:52 ERR 80.215.138.12->80.215.138.12 DoliDBMysqli::close Closing a connection with an opened transaction depth=2
2018-07-26 16:47:52 WARNING 80.215.138.12->80.215.138.12 — End access to /ctrlop/htdocs/compta/paiement.php (Warn: db disconnection forced, transaction depth was 2)