cache – 1 exception(s): Exception #0 (MagentoFrameworkExceptionValidatorException): Invalid template file:

Magento 2.3.4
Noticed some of my menu options are not working and in Cache Management I am now faced with a white screen and lots of errors. I tried to paste the whole thing but this site thinks it is spam and will not let me post. The opening line reads….

‘1 exception(s):
Exception #0 (MagentoFrameworkExceptionValidatorException): Invalid template file: ‘Magento_Backend::system/cache/additional.phtml’ in module: ‘Magento_Backend’ block’s name: ‘cache.additional’

Any help massively appreciated