uk – the brazilian refused as a visitor. will I have problems with a fiancee visa?

I do not know if it is the right page, but I hope everyone can help me with this question:

In April 2019, I was refused entry to the UK as a visitor (V4.2 a)
but I'm going to start applying for a fiancee visa next month, we're on this remote relationship for over 3 years

Will the fiancee visa be refused because I have already refused as a visitor before?

is there anyone else who has passed for the same situation before and can give me a positive one years