Multiple QA failures in Canary and Production

Summary

Failing spec(s):

Multiple QA specs failed when https://ops.gitlab.net/gitlab-com/gl-infra/deployer/-/pipelines/1713209 was deployed

Stack trace

Several cases of 404

2) Plan Epics milestone dates API updates epic dates when adding another issue
     Failure/Error:
       Resource::ProjectMilestone.fabricate_via_api! do |milestone|
         milestone.project = project
         milestone.start_date = start_date
         milestone.due_date = due_date
       end
     
     QA::Resource::Errors::ResourceFabricationFailedError:
       Fabrication of QA::Resource::ProjectMilestone using the API failed (404) with `{"message":"404 Project Not Found"}`.
       Correlation Id: 4fe3b589a52321be4fe9c6b4e3f5b116
       Sentry Url: https://sentry.gitlab.net/gitlab/gitlabcom/?environment=gprd&query=correlation_id%3A%224fe3b589a52321be4fe9c6b4e3f5b116%22
       Kibana - Discover Url: https://log.gprd.gitlab.net/app/discover#/?_a=%28index:%277092c4e2-4eb5-46f2-8305-a7da2edad090%27%2Cquery%3A%28language%3Akuery%2Cquery%3A%27json.correlation_id%20%3A%204fe3b589a52321be4fe9c6b4e3f5b116%27%29%29&_g=%28time%3A%28from%3A%272023-02-05T15:46:33.186Z%27%2Cto%3A%272023-02-06T15:46:33.186Z%27%29%29
       Kibana - Dashboard Url: https://log.gprd.gitlab.net/app/dashboards#/view/5e6d3440-7597-11ed-9f43-e3784d7fe3ca?_g=%28time%3A%28from:%272023-02-05T15:46:33.186Z%27%2Cto%3A%272023-02-06T15:46:33.186Z%27%29%29&_a=%28filters%3A%21%28%28query%3A%28match_phrase%3A%28json.correlation_id%3A%274fe3b589a52321be4fe9c6b4e3f5b116%27%29%29%29%29%29
     # ./qa/resource/api_fabricator.rb:147:in `api_post_to'
     # ./qa/resource/api_fabricator.rb:123:in `api_post'
     # ./qa/resource/api_fabricator.rb:28:in `fabricate_via_api!'
     # ./qa/resource/base.rb:65:in `block (2 levels) in fabricate_via_api!'

Page did not fully load.:

Failures:
  1) Plan Issue creation closes an issue
     Failure/Error: Page::Project::Menu.perform(&:click_issues)
     
     QA::Support::Repeater::WaitExceededError:
       Page did not fully load. This could be due to an unending async request or loading icon.
     # ./qa/support/repeater.rb:74:in `repeat_until'
     # ./qa/support/waiter.rb:20:in `wait_until'
     # ./qa/support/wait_for_requests.rb:11:in `wait_for_requests'
     # ./qa/page/sub_menus/common.rb:19:in `within_sidebar'
     # ./qa/page/project/sub_menus/issues.rb:19:in `click_issues'
     # ./qa/scenario/actable.rb:16:in `perform'
     # ./qa/specs/features/browser_ui/2_plan/issue/create_issue_spec.rb:49:in `block (3 levels) in <module:QA>'
     # ./qa/specs/spec_helper.rb:120:in `block (2 levels) in <top (required)>'
     # ./qa/specs/knapsack_runner.rb:15:in `run'
     # ./qa/specs/runner.rb:57:in `perform'
     # ./qa/scenario/template.rb:10:in `block in perform'
     # ./qa/scenario/template.rb:8:in `tap'
     # ./qa/scenario/template.rb:8:in `perform'
     # ./qa/scenario/template.rb:50:in `perform'
     # ./qa/scenario/template.rb:10:in `block in perform'

Unable to find visible css "input[id="url"]"

Failures:
  1) Monitor Alert settings when using Prometheus integration behaves like sends test alert using authorization key creates new alert
     Failure/Error: Flow::AlertSettings.integration_credentials
     
     Capybara::ElementNotFound:
       Unable to find visible css "input[id=\"url\"]"
     Shared Example Group: "sends test alert using authorization key" called from ./qa/specs/features/browser_ui/8_monitor/alert_management/create_alert_using_authorization_key_spec.rb:99
     # ./qa/page/project/settings/alerts.rb:108:in `webhook_url'
     # ./qa/flow/alert_settings.rb:49:in `block in integration_credentials'
     # ./qa/scenario/actable.rb:16:in `perform'
     # ./qa/flow/alert_settings.rb:47:in `integration_credentials'
     # ./qa/specs/features/browser_ui/8_monitor/alert_management/create_alert_using_authorization_key_spec.rb:40:in `block (3 levels) in <module:QA>'
     # ./qa/specs/features/browser_ui/8_monitor/alert_management/create_alert_using_authorization_key_spec.rb:9:in `block (4 levels) in <module:QA>'
     # ./qa/specs/spec_helper.rb:120:in `block (2 levels) in <top (required)>'
     # ./qa/specs/knapsack_runner.rb:15:in `run'
     # ./qa/specs/runner.rb:57:in `perform'
     # ./qa/scenario/template.rb:10:in `block in perform'
     # ./qa/scenario/template.rb:8:in `tap'
     # ./qa/scenario/template.rb:8:in `perform'
     # ./qa/scenario/template.rb:50:in `perform'
     # ./qa/scenario/template.rb:10:in `block in perform'
     # ./qa/scenario/template.rb:8:in `tap'

Screenshot / HTML page

Possible fixes