Hi everybody,
after upgrading to V3 I only can see this message:
An error occured
Template “@CoreHome/_applePinnedTabIcon.twig” is not defined in “@CoreUpdater/layout.twig” at line 16.
Before I try to restore from backup I will ask here for a solution 
Thanks and best regards
Markus from Northern Frisia
Hello,
try to re-upload all files. it should work afterwards
OK, thank you for your quick Response.
I will download and extract the Installation files and upload them.
The Upgrade was started as auto-upgrade.
I will let you know, what the result is.
UPGRADE:
After downloading and unpacking the zipped insallation files I uploaded them excpt the Folder “config”.
First time after the upload I was asked to run the database upgrade script.
Now everything seems to be right.
Thank you very much and best regards from Germany
Markus