We frequently (once in 2 - 3 weeks) update our limesurvey installation with the automatic update function and bought update key to the latest version.

This morning we did this too. Before the update all was working fine. After the update we get the warning: 
Error Het attribuut "SurveyLanguageSetting.surveyls_alias" is niet gedefinieerd. within our dutch limesurvey installation.

We went through the total update process.

How to solve this problem?

 

We have a 5.X installation by the way.

As you are a paying customer of Comfort Update you have the right to support via support ticket from Limesurvey GmbH, for issues related to ComfortUpdate.

Here in the forum it is mainly users helping users and we generally have no insights into ComfortUpdate, which is a feature solely developed by Limesurvey GmbH.

Don't let yourself get redirected to the forum in the process and if the 1st level support claims that they don't give support for the community edition, keep insisting. It is correct and makes sense that they won't give you support for the community edition, but in this case it has to do with ComfortUpdate and I have been assured that you should receive support for anything ComfortUpdate related.