Please can you suggest what is causing the blue button (image
attached) to have black text on it as it is difficult to read?
Once clicked through to Pricing Plans the text is white and well contrasted.
Thanks for any help 
If you have added that button to the page yourself, then it isn’t a code related issue and you can simply change it through its own settings.
https://support.wix.com/en/article/changing-your-buttons-design
Hey it’s you!. I’ve read so many posts from you over the last 2 months of intense Corvid learning. Thanks for replying to me.
The page just appeared one day. I thought it had been a Wix update which inserted it between a public page and a plan required page.
I would be most grateful for any ideas you may have.
Your issue is not code related and you need to go through Wix Support for more help with this.
https://support.wix.com/en/article/contacting-wix-support
In the meanwhile you can read the Wix Support pages for the Wix Paid Plan app and find your answer there already.
https://support.wix.com/en/paid-plans/designing-your-paid-plans-page
https://support.wix.com/en/article/request-customize-the-only-for-subscribers-text-in-the-paid-plans-app
Thanks a heap for your feedback. Take care and keep up your excellent support. You are a legend:)
I have also studied a lot of these posts, thank GOS(best teacher I’ve met) for the valuable information. Besides I also had problems with displaying text in one of my projects, the button and text were red, so I could not understand why the text was not displayed for a long time) The project was recently launched fixed, you can have a peek here . In fact, this is an easy-to-fix bug, but it was really funny.