#6613 [BUG] securecookie: the value is too long Issue created by Blarc ### Flyte & Flytekit version

flyte-binary:v1.15.3

(I've also tried

v1.16.0-b3

) ### Describe the bug I am using Helm chart for deploying

flyte-binary:v1.15.3

(I've also tried

v1.16.0-b3

). After adding GitLab as external OIDC provider, I get the following error:

{"json":{"src":"handlers.go:91"},"level":"error","msg":"Failed to retrieve tokens from request, redirecting to login handler. Error: [EMPTY_OAUTH_TOKEN] Failure to retrieve cookie [flyte_idt], caused by: http: named cookie not present","ts":"2025-09-04T05:59:54Z"}
{"json":{"src":"handlers.go:91"},"level":"error","msg":"Failed to retrieve tokens from request, redirecting to login handler. Error: [EMPTY_OAUTH_TOKEN] Failure to retrieve cookie [flyte_idt], caused by: http: named cookie not present","ts":"2025-09-04T05:59:57Z"}
{"json":{"src":"cookie_manager.go:192"},"level":"error","msg":"Error generating encrypted id token cookie [SECURE_COOKIE_ERROR] Error creating secure cookie, caused by: securecookie: the value is too long","ts":"2025-09-04T05:59:57Z"}
{"json":{"src":"handlers.go:208"},"level":"error","msg":"Error setting encrypted JWT cookie [SECURE_COOKIE_ERROR] Error creating secure cookie, caused by: securecookie: the value is too long","ts":"2025-09-04T05:59:57Z"}

I thought this was fixed in #3750 ? ### Expected behavior Be able to sign in with GitLab. ### Additional context to reproduce Helm chart's auth configuration: auth: enabled: true oidc: baseUrl: https://gitlab.medius.si clientId: x clientSecret: x internal: clientSecret: x clientSecretHash: x authorizedUris: - x flyteClient: scopes: - profile - openid - email - read_user ### Screenshots No response ### Are you sure this issue hasn't been raised already? • Yes ### Have you read the Code of Conduct? • Yes flyteorg/flyte