Target class \Application\Theme\MyTheme\PageTheme does not exist after upgrade from Version 8 to 9

Using Concrete / Help
1

We have a theme developed for us by another developer. I recently upgraded the site from 8.5.19 to Version 9.3.8 but now have the error:

Target class \Application\Theme\MyTheme\PageTheme does not exist
(MyTheme is not the actual name)

I have edited the page_theme.php and changed the namespace:
namespace Concrete\Theme\MyTheme
to
namespace Application\Theme\MyTheme

Cleared the Application\Files directory, and cleared browser cache. Still get this error.

The site is totally offline.

First question, is there a way to disable caching in the database? Some info points to the config table, but there is nothing in there relating to caching.

Second Question, where else can I look for help?

Thanks in Advance;
Terry

2

@4cloud
Was your theme a standalone theme or a package?
Did you install it in the application/themes folder or the root/packages folder?

3

It is a standalone package.

We rolled back to 8.5.19 and will try to contact the developer for more help.

Strangely, in 8.5.1 we can use either namespace and it will work fine.

4

Where was the package installed?
In the root/packages folder, or the application/themes folder?
If your theme was installed in the application/themes folder, the namespace would look like this:

namespace Application\Theme\Yourtheme;

If it was installed as part of a package in the root/packages folder, the namespace would look like this:

namespace Concrete\Package\Yourtheme\Theme\Yourtheme;
5

It is installed in the Application directory.

Here is the top of the page_theme file, theme name edited. The namespace was Concrete\Theme\MyTheme, but i have since changed it to Application\Theme\MyTheme

namespace Application\Theme\MyTheme;
use Concrete\Core\Page\Theme\Theme as Theme;
defined('C5_EXECUTE') or die("Access Denied.");

class PageTheme extends Theme
{
	
    protected $pThemeName = 'MyTheme';
    protected $pThemeDescription = 'MyTheme - 2020 Theme';
    protected $pThemeHandle = 'MyTheme';
    protected $pThemeGridFrameworkHandle = 'bootstrap3'; 

    /**
     * Register theme assets, see http://goo.gl/rpJUSy
     *
     */ public function registerAssets() {
           $this->providesAsset('css', 'bootstrap/*');
     /*    $this->providesAsset('css', 'blocks/form');
     */    $this->requireAsset('javascript', 'jquery');
      }
     /*/
6

Overrides cache can be disabled to help with testing and development. Search for “cache” in the Dashboard intelligent search bar.