After upgrade (4.0.4 - 4.0.5) every Background process runs quickly, but Rebuilding post images stoped at 7,21 %. I waited for 5 hours, but nothing happend. I deleted the whole forum and the database and I restored everything from the save and I did the upgrade again, but the same thing happend.

happend to me too- you need to go to support- and chose the second option- after that you will get a guide to fix it.

happend to me too- you need to go to support- and chose the second option- after that you will get a guide to fix it.

​I can not write to support, because at step two I have this error massage:

Sometimes badly cached data can cause problems. We have cleared all cached data, please check and see if your problem has been resolved.

And I have only one button, this:

The problem is not resolved

If I press it, it loads the same screen, so I can not go any further.

got that too, after that it worked for me- if it doesn't work again (you need to start it) - open a ticket