When I removed the FIELD I made, so I got also no error when I used the search function.

Strictly speaking; FIELDS is well, aiming to add more alternative?

Bugg or simply bad updated plugin?

PS: Checkbox in FIELDS gav me error on search. But not then i use Rich Tekst field insted.

Moreover, one can say:

The search function does not work. And in FIELDS, Text field and Checkbox does not work either