problems with dashboard: cant click on "add functualitiy" or properties
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I get this error:
Fatal error: Cannot make static method AttributeKey::getList() non static in class CollectionAttributeKey in /var/www/zmtrx.com/concrete/models/collection_attributes.php on line 193
How to fix??
Fatal error: Cannot make static method AttributeKey::getList() non static in class CollectionAttributeKey in /var/www/zmtrx.com/concrete/models/collection_attributes.php on line 193
How to fix??

btw: there isnt any thing on line 193
this sounds like a bad upgrade.
make sure all files were uploaded correctly,
I had the same problem with a site that I upgraded manually by copying new concrete folder over the old one.
The solution was to delete the whole concrete/ folder and copy new one from the 5.4.1 installation zip-file.
The solution was to delete the whole concrete/ folder and copy new one from the 5.4.1 installation zip-file.