Are there more places this needs to be added?

I know this wasn't mentioned in the original issue, but wouldn't it makes sense to show this message only to super users? The message already says to contact the administrator if it happens again, which should be enough for normal users.

Are there more places this needs to be added?

have you tried searching for the translation string like this: https://github.com/matomo-org/matomo/search?q=General_ErrorRequest where i can see these for example:

• matomo/plugins/Morpheus/templates/ajaxMacros.twig

  Lines 20 to 24 in 2b35b46

  	{% if emailSuperUser is defined and emailSuperUser %}
  	{{ 'General_ErrorRequest'|translate('<a href="mailto:' ~ emailSuperUser ~ '">', '</a>')|raw }}
  	{% else %}
  	{{ 'General_ErrorRequest'|translate('', '') }}
  	{% endif %}

• matomo/plugins/MultiSites/angularjs/dashboard/dashboard.directive.html

  Line 61 in 2b35b46

  {{ 'General_ErrorRequest'|translate:(''):('') }}

• matomo/plugins/Dashboard/javascripts/dashboardWidget.js

  Line 176 in b20dc4d

  var errorMessage = _pk_translate('General_ErrorRequest', ['', '']);

Maybe we could add it there as well somehow?

I know this wasn't mentioned in the original issue, but wouldn't it makes sense to show this message only to super users? The message already says to contact the administrator if it happens again, which should be enough for normal users.

Thanks for picking this up, yes, it would be important to only show the FAQ link to Super users 👍

General_ErrorRequest

Yes, I had found quite a few references myself, but thought I'd ask in the PR before committing too much effort into it.

Hi @sgiehl . Do you have time to look at this, please?

How do I can disable this behaviour?
It's ok by overwriting the template by a ThemePlugin?
I don't want to bug administrators, but configured "From Recipient" installation global wide

I'm not sure what exactly you mean. The linked code is actually outdated. Meanwhile it's possible to configure a contact email address. See #17916

Ok! Fine! I wasn't aware of the new configuration, was exactly what I was looking for.
In the while, I was also able to override error message inside ajaxMacros.twig by putting an override into my ThemePlugin.
Thanks!