Announcements: Plogger PHP8

This announcement came out just as I had uploaded the PHP7 files by my webhost.

I thought maybe take one step at a time. So that went fairly well.

I can change theme and opted for the one that looks similar to my website. I uploaded a group of images and they are there.

BUT I cannot view them. When I look at the Plogger view, I see all the placeholders, for images and navigation, labels are visible but the icons for navigation and the images do not show. [see https://www.narpo-staffs.co.uk/photo_gallery2/index.php?level=collection&id=4]

So now I have had added the PHP8 files in a new database and the web host has upgraded my access to PHP8. Sadly, I am getting no luck with PHP8.

Is there an obvious step I have overlooked i in the PHP7 install?

I'm still working on getting to display my images in the PHP version of Plogger. I came across on older post.
General Support: PHP GD extension is not installed, it is required to upload images.
plog-includes/lib/phpthumb/phpthumb.functions.php line 362
Old:
if (ereg_match('bundled \((.+)\)$', $gd_info['GD Version'], $matches)) {

New:
if (preg_match('/bundled \((.+)\)$/', $gd_info['GD Version'], $matches)) {


Just found in my file phpthumb_functions (which is the last rendition installed) at lines 525 to 536 this code.

public static function gd_version($fullstring=false) {
static $cache_gd_version = array();
if (empty($cache_gd_version)) {
$gd_info = gd_info();
if (preg_match('#bundled \((.+)\)$#i', $gd_info['GD Version'], $matches)) {
$cache_gd_version[1] = $gd_info['GD Version']; // e.g. "bundled (2.0.15 compatible)"
$cache_gd_version[0] = (float) $matches[1]; // e.g. "2.0" (not "bundled (2.0.15 compatible)")
} else {
$cache_gd_version[1] = $gd_info['GD Version']; // e.g. "1.6.2 or higher"
$cache_gd_version[0] = (float) substr($gd_info['GD Version'], 0, 3); // e.g. "1.6" (not "1.6.2 or higher")
}
}

So wondering if this is where my failed image display is occurring?

Should I dabble in this area?