Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: actions/checkout@v4, actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea, actions/setup-dotnet@v4. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Node.js 20 will be removed from the runner on September 16th, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Dereference of a possibly null reference.

The type 'Captcha.Core.Models.PostCreateCaptchaRequest?' cannot be used as type parameter 'T' in the generic type or method 'RestRequestExtensions.extension(RestRequest).AddJsonBody<T>(T, ContentType?)'. Nullability of type argument 'Captcha.Core.Models.PostCreateCaptchaRequest?' doesn't match 'class' constraint.

Cannot convert null literal to non-nullable reference type.

Possible null reference argument for parameter 'request' in 'CaptchaConfigurationData RequestToDomainMapper.ToDomain(GetCreateCaptchaRequest request)'.

Converting null literal or possible null value to non-nullable type.

Cannot convert null literal to non-nullable reference type.

Possible null reference argument for parameter 'request' in 'CaptchaConfigurationData RequestToDomainMapper.ToDomain(PostCreateCaptchaRequest request)'.

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 'config' in 'SKBitmap CaptchaImageService.CreateCaptchaImage(CaptchaConfigurationData config)'.