8.5.5 Fresh install : mail sending with decision

Hello again (yes, this is a projeqtor testing afternoon ),

On a full working fresh install (LDAP OK, mail sending OK), I create a decision, I add an approver and then click on «send a reminder mail to approver» («Envoyer un mail de rappel aux approbateurs»)
I get an error «Impossible d'envoyer un mail à ''. »
But my resource / user / contact is properly configured (and displayed) and can receive mails from other entities of projeqtor (eg mails for alerts).

Moreover, the error message asks me to have a look to the log file to have more information ... but when I actually opens the log file (through Projeqtor, not directly on the webserver), there is definetly no information about this message sending error.

Hello,
I have just updated to 8.6.3 this morning and I still have the problem : exactly same approach but the error message is now «Aucun destinataire d’email n’a pu être déterminé» ... whereas everything seems to be configured properly (in that case, my account).

I have no information in the log file, even after having set the debug level to «Debug» through the brand new (and welcome) interface.

There is actually a line in the logfile :
2020-11-03 14:28:38.202 ***** ERROR ***** [V8.6.3] PHPMail error : You must provide at least one recipient email address.

I am the only approver, my email is valid and I receive other mails from Projeqtor ... Oh, my bad, I am too tired: I am the only approver and I checked «do not send my proper emails» in the configuration. I understood by reading your answer.

I tried with a coherent configuration ... Well it works !

... another chair/keybord interface bug