"我没有意见。"

Translation: I don't have an opinion.

[AbunPang]

While "I don't have an opinion" may be the literal translation, the implied meaning is very different from English: It could be "I don't care", but if there is already a suggestion and someone 有意见, what you mean is that that person has a differing opinion – in other words an objection to the suggestion.

[Winston298006]

I have no objections.

[eileenyxx]

While its a fine direct translation i agree with above comments that in use it means something more like "i don't mind" or "i don't object"

[KX3.]

I'm okay with (it, both suggestions, anything, etc.). I've no objections. No comment or Nothing from me.

[Jumaru2]

I put I don't mind. Duolingo said that it was wrong. It's not. Both should have been excepted.