Ugrade 4.3.15 -> 5.0.7 seems ok but cannot upgrade site within browser

[d.wiedemann (David Wiedemann)]

Hi Jelena

"We" could solve the problem. We means @pbauer, who kindly did the migration for us.
The whole process is described in the following post:

Problem migrating from Archetypes to Dexterity via @@atct_migrator

Yesterday we had a screesharing-session and figured out how to fix the issues: Generally you should migrate to the latest Plone 5, then migrate to Dexterity. Even better to migrate to 5.1 since the at-dx migration in 5.1 included many improvments that were not backported to 4.3 or even 5.0. Another thing (not an issue here): If you have LinguaPlone you need to migrate to plone.app.multilingual (with archetypes.multilingual) before upgrading to Plone 5! Then migrate from AT to DX in Plone 5. Th…

Basically the wicked-thing could be solved by the following high-level process:

• Under Plone 4.x disable wiki behaviour via Control panel
  -> As a result, the wiki-links in the site were not rendered as links anymore but instead just regular text with the double-brackets
• Add wicked to buildout for Plone 5.x
• Update to Plone 5.x
• Add add-on collective.simplewiki to Plone 5 and enable it

More details are in the other post. But I do not really understand the details of what pbauer has done in details

I hope, this helps you a bit further! Good luck and kind regards
David