Spirit Sprite HTTP Error

Hi there,
I recently changed my hosting to have ssl. I am seeing this message with regards to the them sprite.svg.

Mixed Content: The page at 'https://mumsbusiness.club/' was loaded over HTTPS, but requested an insecure image 'http://mumsbusiness.club/wp-content/themes/uf-spirit/ui/sprite.svg'.

I have tried installing a plugin SSL Insecure Content Fixer but it hasn't fixed the issue. Can you please advise how to change this link to https?

I have granted support access :slight_smile:

Many thanks,