I get an notification that there is an update available (6.4.8.1), and open the update wizard. But, the spinning „thing“ are just spinning (I can see the information in light grey, behind). It’s seems like the system checking is never completed.
Is it safe to click the „Start update“ button anyway?
/Magnus
I had the same issue in a local installation. I had no problems running the update, like you have described.
Thanks
I will give it a try then.
/Magnus
Okay, that didn’t go so well. 
Run the installer and everything seem to go well. But after clicking the last button (don’t remember what it says), I get a 503 error on both frontend and backend.
Manually cleared cache folder (in var) but that did not helped.
Any tricks to try before rolling back?
The last entry in the log file are this:
[2022-03-17T09:36:28.244754+00:00] request.CRITICAL: Uncaught PHP Exception Shopware\Core\Framework\Store\Exception\StoreApiException: „The taken action is unauthorized“ at /home/kattgodi/public_html_custom/vendor/shopware/core/Framework/Store/Api/StoreController.php line 164 {„exception“:"[object] (Shopware\Core\Framework\Store\Exception\StoreApiException(code: 0): The taken action is unauthorized at /home/kattgodi/public_html_custom/vendor/shopware/core/Framework/Store/Api/StoreController.php:164)"}
[2022-03-17T09:36:33.288302+00:00] request.CRITICAL: Uncaught PHP Exception GuzzleHttp\Exception\ClientException: "Client error: POST https://api.shopware.com/swplatform/autoupdate?shopwareVersion=6.4.7.0&language=en-GB&domain=kattgodis.nu resulted in a 401 Unauthorized response: {„success“:false,„code“:„ShopwarePlatformException-1“,„title“:„Unauthorized“,„description“:„The taken action is unauthor (truncated…) " at /home/kattgodi/public_html_custom/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php line 113 {„exception“:“[object] (GuzzleHttp\Exception\ClientException(code: 401): Client error: POST https://api.shopware.com/swplatform/autoupdate?shopwareVersion=6.4.7.0&language=en-GB&domain=kattgodis.nu resulted in a 401 Unauthorized response:\n{„success“:false,„code“:„ShopwarePlatformException-1“,„title“:„Unauthorized“,„description“:„The taken action is unauthor (truncated…)\n at /home/kattgodi/public_html_custom/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php:113)“}
Server had a 503 error.
Usually to log out from the Shopware account and to log in again solves the Unauthorized problem. Since you cannot access the backend, that’s a real dealbreaker.
My installation is pretty vanilla, with only one third-party extension. But, while looking for a solution I read in GitHub that 6.4.9 comes with Bootstrap 5 - with „braking changes in twig templates and SCSS“.
So before trying to upgrade again, I really need to first check my theme (locally) with 6.4.9. And I’m not sure about the Bootstrap version on my local installation (v6.4.99 Stable Version 99999.9999999).
Shopware 6.5 comes with Bootstrap 5. In 6.4.x there are only flags in the source code for developers.
Okay. Thanks!
Then should the theme work in 6.4.9. When I manage to install it. 