The website encountered an unexpected error. Please try again later.

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Hi all,

I installed TB Mega Menu on 8.02. After installing, when trying to configure Mega Menu, I get the error of "The website encountered an unexpected error. Please try again later."

Based on that, I searched on google and found a patch https://www.drupal.org/node/2623306

but so far I have not done any patch and do not know how to do it.

Is this the right way? If it is, could you please tell me step by step how I can do it and which program should I use?

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You should read the tutorial Applying patches to know how to apply it. The patch hasn't officially tested by us, but other people has tried and have a good feedback about it.