TOPIC: "Table class TableField not found in file" after migration

Hi,

I'm presently in a migration from J1.5 to 2.5 and everything seems to be working fine but for one problem. If I Publish the DT Register Upcoming event module, I get "Table class TableField not found in file." on my pages. Everything is functional, I see the events, I can register and so on! As soon as I unpublish it it goes away.

I tried to Unpublish most of the other modules and Plugins without any success.

I'm running (On Xampp)
J2.5.9
DTRegister 2.8.12
DTRegister Upcoming events 2.9.17

Any ideas?

Thanks in advance

Here's pics of the Errors in Joomla debug