Hello Sebastian,
Thanks a lot for your concern and answering.
That's what I done several times yesterday: deleting the database, restoring files, and re-trying the upgrade process... Without any success, always the same problem. I even tried Nina advice, without much success neither. For information, I done this procedure several times in the past, without any trouble...
Here is the procedure I follow, it might help you to tell me if I done something bad:
1/ backup DB (4.8.2)
2/ unzip files locally on my computer (I tried DNN 4.8.3 Install and DNN 4.8.3 Upgrade as well / Same result)
3/ add App_Offline.htm to prevent the mess...
4/ FTPing the files to my folder (overwriting existing files)
4 Bis/ Modifying web.config (to reflect the web.config which is provided with the Install/Upgrade pack)
5/ removing App_Offline.htm
6/ accessing my website http://domain.com/Install/Install.aspx?Mode=Upgrade (I also tried Mode = Install, as well as Install.aspx only)
I always have the error mentionned before (DotNetNuke configuration error)... But that's strange, if I access my website, it runs normally, and when I login and access Host Settings, it says that I am running V 4.8.3 !!!!
==> How could I be sure that the whole process went well, without any problem ? And that my version is V4.8.3
I think that 4.8.2 and 4.8.3 are very similar, what are the difference, and how could I be sure that I am safe and relax ???
Thanks a lot for your help Sebastian.
DV FX