J3.x:Infinite error loop on multilanguage sites

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In some multilingual sites that were created before Joomla 2.5.4 when upgrading to 3.4 you can have a redirect loop created.

Errors reported

Infinite redirect in browser when attempting to visit multilingual site.

Versions affected

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General Information

This pertains only to Joomla! version(s):- 3.4

What is the cause

In Joomla 2.5.4 and earlier the access level was not correctly stored in the database and as a result a value of 0 was obtained. This therefore then fails against the access check in the language filter plugin creating a redirect loop.

How to fix

Edit each content language in Language Manager and ensure a access level (generally public) is set for each installed language.