[Triage] Error 500 - insufficient_date_information

[Majkic666]

So when going to media profiles and clicking +new source this error pops up. If no source exists this also popsup.

It is stated as an "Internal Server Error" but i highly doubt the issue is on my end. App worked fine yesterday, when setting up on truenas scale.

I also have an instance running on a Synology server, this one has been working for a long time, no change have been made to it and it has the same error.

I assume this is a bug caused by the latest update.

Status:
500

Reason:
%Timex.Format.FormatError{message: "insufficient_date_information"}

Stacktrace:

    (timex 3.7.11) lib/format/datetime/formatter.ex:68: anonymous fn/1 in Timex.Format.DateTime.Formatter.lformat!/4
    (pinchflat 2025.9.26) lib/pinchflat_web/controllers/sources/source_html.ex:46: PinchflatWeb.Sources.SourceHTML.cutoff_date_presets/0
    (pinchflat 2025.9.26) lib/pinchflat_web/controllers/sources/source_html/source_form.html.heex:132: anonymous fn/3 in PinchflatWeb.Sources.SourceHTML."source_form (overridable 1)"/1
    (phoenix_live_view 1.0.17) lib/phoenix_live_view/engine.ex:149: Phoenix.HTML.Safe.Phoenix.LiveView.Rendered.to_iodata/1
    (phoenix_live_view 1.0.17) lib/phoenix_live_view/engine.ex:161: Phoenix.HTML.Safe.Phoenix.LiveView.Rendered.to_iodata/3
    (phoenix 1.7.21) lib/phoenix/controller.ex:1008: anonymous fn/5 in Phoenix.Controller.template_render_to_iodata/4
    (telemetry 1.3.0) /app/deps/telemetry/src/telemetry.erl:324: :telemetry.span/3
    (phoenix 1.7.21) lib/phoenix/controller.ex:974: Phoenix.Controller.render_and_send/4

[Majkic666]

As a side note: Using "ghcr.io/kieraneglin/pinchflat:v2025.6.6" fixes the issue, so it is 100% an issue with the latest version.

[greedylambda]

Apparently this is because Timex creates an Ambiguous DateTime when shifting... sometimes. I thought it had to do with daylight savings as -7 days was just on the boundary of that for me here in Germany, but checking the same function a few minutes later and suddenly I get a regular DateTime now. Playing around with the Timex.shift now doesn't seem to trigger an Ambiguous DateTime either, so something might be up with tzdata. I'm not good enough to figure out if there is a way in elixir to strip a DateTime of its ambiguity, but I don't know if you should be doing that anyway. Probably not.