Cannot convert mixed or non-array tables: keys must be strings Table glitch?

I have a table in a client script. Elemetns are added to the table and they are only strings. But apparently they arent.. Cause whenever I try to but this table into a pairs loop it either just doesnt run or gives the error:

"Cannot convert mixed or non-array tables: keys must be strings"

I am very very confused because I have not been addeing anything other than strings to the table?

If someone could help that would be very very much appreciated :)