[BUGFIX] Catch possible exceptions while loading YAML files via import

If an error happens during loading YAML files, e.g. because the path is
wrong or the used extension has been deactivated, the website must still
be working.

The error is now logged as error instead.

Resolves: #88993
Releases: master, 9.5
Change-Id: I0103fac53a6f1ff6216bdc11961ffe76fea8a9b4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61761


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>