Thank you for your quick answer.
Well, I do not understand where is the problem :
- cookies cleaned (CCleaner, parameters of my explorer, ...)
- tried under 3 explorer : Firefox, Chrome, IE - with 2 differents PC (Windows 10, SEVEN)
- no plugin with for encryption
- tried with http or https (security is on with my site)
... always same pb, and each time a different user (not admin) which is used to try to connect to the database ... unbelievable
(NB : latest version is 6.5.3, not 5.5.3 )
2 warnings in the console of Firefox :
- using XMLHttpRequest is obsolete : negative impact with user navigation
- using "getAttributeNode() is obsolete, you should use getAttribute()
I'll try this week-end at home, with still another PC (and maybe another server too, in localhost ?)
maybe the problem is the version of PHP ? or MySQL ?
to be continued ...
Denis