问题
I tried to install the introduction package in Typo3 cms.
But I receive the following error:
Service Unavailable (503) No TypoScript template found!
回答1:
You might need to include the package into your core template in Typo3.
Whenever you are using a new package/extension which having template files, you are needed to added those in your root template.
Go to Template Menu in the typo3 backend
Select the root page from the treelist on the left side panel (it might be Congratulations).
Choose the info/modify from the top list
click on Edit the whole template record button.
Choose the includeTab
Add the package related to it.
来源：https://stackoverflow.com/questions/58638232/service-unavailable-503-no-typoscript-template-found