[SOLVED]Changing Incident Template results in INVALID_CSRF_TOKEN

[SOLVED]Changing Incident Template results in INVALID_CSRF_TOKEN

Hello,

We have two Incident-Templates in ServiceDesk Plus, that are unusable. Locked behind the error INVALID_CSRF_TOKEN.
Whenever we change or try to delete these two templates, we get the same error..
Changes made are discarded; A delete action is ignored/unsuccessful.
Both templates are very minimalistic as shown in added screenshot.

Please help remove the templates and find out what the problem is, so we can prevent this error from happening again.

Greets,
Danny

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