Renderer Exception when showing addtional asset fields

Renderer Exception when showing addtional asset fields

I upgraded from 7022 to 7500 and then to 7502 (finally! sighsss), and restored the data. Now I have a problem, I am getting [Renderer Exception] caption for the asset grid columns when showing addtional asset fields.

The real name of the additional field is not shown, only this strange caption and the asset grid's "column chooser" cannot be displayed!
What happens?, The new release is very nice but Im still suffering with 7.5!


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