Parabolic app not launching

graham · February 9, 2026, 4:46pm

Up to a few days ago the Parabolic app launched without issue.

On trying to open the app today (9 Feb 2026) it does nothing when clicking on it.

Debian 12 GNOME DE

Any hints as to what might be the issue? Have deleted it and re=installed but to no avail.

yakushabb · February 9, 2026, 9:39pm

A huge update released a few day ago. See: 2026.2.1 by nlogozzo · Pull Request #199 · flathub/org.nickvision.tubeconverter · GitHub

Could you report the issue to related issue tracker.

graham · February 10, 2026, 8:39am

Thank you. That is now done:

graham · February 17, 2026, 8:55am

This matter is now resolved following placing a bug report with the release of a new version 16.2.4

github.com/NickvisionApps/Parabolic

[Bug] Application Not Loading

opened 02:07PM - 10 Feb 26 UTC

closed 12:42AM - 17 Feb 26 UTC

GrahamLees

bug

### Describe the bug On trying to open the application in Debian 12.13 GNOME De…sktop Environment nothing happens. Until a few days ago, the application opened without issue. Parabolic 20206.2.2 on running flatpak run org.nickvision.tubeconverter `Unhandled exception. System.Text.Json.JsonException: The JSON value could not be converted to System.Int32. Path: $.PostprocessingThreads | LineNumber: 0 | BytePositionInLine: 684. ---> System.InvalidOperationException: Cannot get the value of a token type 'Null' as a number. at System.Text.Json.ThrowHelper.ThrowInvalidOperationException_ExpectedNumber(JsonTokenType tokenType) at System.Text.Json.Utf8JsonReader.TryGetInt32(Int32& value) at System.Text.Json.Utf8JsonReader.GetInt32() at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader) at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value) at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value, Boolean& isPopulatedValue) at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, T& value, JsonSerializerOptions options, ReadStack& state) --- End of inner exception stack trace --- at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, Utf8JsonReader& reader, Exception ex) at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, T& value, JsonSerializerOptions options, ReadStack& state) at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.Deserialize(Utf8JsonReader& reader, ReadStack& state) at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 utf8Json, JsonTypeInfo`1 jsonTypeInfo, Nullable`1 actualByteCount) at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 json, JsonTypeInfo`1 jsonTypeInfo) at Nickvision.Desktop.Filesystem.JsonFileService.Load[T](String name) at Nickvision.Parabolic.Shared.Controllers.MainWindowController..ctor(String[] args) in /run/build/org.nickvision.tubeconverter/Nickvision.Parabolic.Shared/Controllers/MainWindowController.cs:line 73 at Nickvision.Parabolic.GNOME.Application..ctor(String[] args) in /run/build/org.nickvision.tubeconverter/Nickvision.Parabolic.GNOME/Application.cs:line 38 at Nickvision.Parabolic.GNOME.Program.Main(String[] args) in /run/build/org.nickvision.tubeconverter/Nickvision.Parabolic.GNOME/Program.cs:line 5` ### Describe the expected result Application runs when opened ### URL _No response_ ### Download Options _No response_ ### Debugging Information ```shell org.nickvision.tubeconverter ``` ### Additional context _No response_

hub · March 2, 2026, 1:00pm

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