After upgrade to Joomla 3.8 all multi-page articles are broken

[mattiaverga]

After upgrading my sites from Joomla 3.7 to 3.8, all multi-page articles are broken. I can view the first page and the table of contents, but when I try to open one of the other pages I get: Call to a member function getCode() on null

For example see http://www.techfromthenet.it/201709284957/Test-networking/avm-fritz-box-7590-l-evoluzione-del-router-xdsl.html

[joomla-cms-bot]

Set to "closed" on behalf of @franz-wohlkoenig by The JTracker Application at issues.joomla.org/joomla-cms/18201

[ghost]

closed as duplicate Report #17830

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