change error level for trashing items interaction with search

Signed-off-by: Christian Richter <c.richter@opencloud.eu>
(cherry picked from commit faf3ff1959)

Backports: https://github.com/opencloud-eu/opencloud/pull/2951
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f