Yesterday I upgraded to version 17 and this morning I received a message from my web hosting company - One.com (copied below). The text they have sent may as well have been written in Latin! I really don't understand what it all means?? Can anyone explain or help?
Anyway, after receiving the message and as the web site (www.favershammrc.org.uk) was last uploaded with V16 software, I fully uploaded the whole web site again this morning to their servers from the V17 I'm now using.
Do I need to do anything?? What is CMS and add ons? Are these part of V17 software?? Sorry, in my case if it doesn't work on clicking the upload button I'm lost!
Oh, I note the V17 file uploading box has altered and the uploading files are no longer shown in the lower (white) text box, now they appear just along the header portion instead! That confused me initially!

Many thanks for your anticipated help.
Regards.
Brian.
Message from One.com.....
Dear Brian
During the first weeks of November, we will change "the latest stable PHP version" on our servers from version 7.4 to 8.0.
Because you use the latest stable version as the PHP version on your webspace for favershammrc.org.uk, you may experience issues after the update, such as error messages or plugins not working correctly.
If your website isn’t working correctly after the update, we recommend that you first update your CMS and add-ons to the latest version. If this doesn’t solve it, you can manually downgrade back to PHP version 7.4 from the one.com control panel. This version will be available until it reaches end-of-life next year on 28 November 2022.