I installed DNN Source version, for custom Module development. I was using it without problems, but then I decided to update Membership Settings.

I changed 3 things:

1) Set minimum Password length to 6 (default 7)

2) Set RequireQ&A to true (default false)

3) Set RequiresUniqueEmail to true (default false)

After that the installation stopped working. It always shows an Upgrade page (from Install folder). On the bottom of the page, there is a message saying, DNN has been upgraded, Click here to go to the Portal. But clicking on the link again takes back to the same page.

I am using DD 4.8.2. What is the possible reason???

Resorting to Original Settings did not restore operation. I will check out the logs, and inform...

This may sound odd, but I installed a separate copy of DNN, and again got this error. This time around, however, the event sequence leading to disaster was different.

As I said, I am developing custom modules for DNN. During that process, I had DNN running through VS. During debugging of my module, I found a mistake in one of the DLLs I had created & put in /bin folder for my module to use it.

I corrected that error from another instance of VS, recompiled the DLL & put it again in DNN /bin folder (remember, DNN was running).

Then, I got a "Could not unload AppDomain exception." I stopped debugging & then restarted, but to get the same "Upgrade" page being displayed. I think, I might have done this last time also, and modified web.config after I got this error, and so thought this was due to that modification.

So, what now??? Is there any way to restore these installations to normal?? (There is no question of Permission errors, as DNN root has FullControl for everyone)