DirectQuery data from mariadb permission error

[aracoustic30]

I tried to create a calculated column in direct query mode to mariadb with the following code

StartDate = workprogram[MonthName]&"-"&workprogram[Year].

There are no errors with calculated column, but when I try to display it in the card visualization. Then, an error like this appears.

has anyone experienced it? how to fix this

[lbendlin]

most likely your string is too long.