Setup: To test this, the site needs to be registered with Brickfield. If you don't have a Brickfield account,  you can register here . (Make sure your server can be accessed over the internet, e.g. using ngrok) Activate your site with Brickfield in "Site administration / Plugins / Admin tools / Accessibility / Brickfield registration" by entering the API and Secret keys. Enable analysis requests in "Site administration / Plugins / Admin tools / Accessibility / Accessibility toolkit settings" Test: Create a new course Turn editing mode on Create a label resource (Text and media area) Edit the resource using the editor's "View source" feature to insert the following HTML and save. < p dir = "ltr" style = "color: #6666ff; background-color: white; font-size: calc(0.90375rem + 0.045vw);" >Calculated font-size</ p > Add the "Accessibility review" block to the course. Click on the "Submit to Analysis" button to request that the course be analyzed by the accessibility toolkit. Manually run the scheduled task on the terminal:  php admin /cli/scheduled_task .php --execute= "\\tool_brickfield\\task\\process_analysis_requests" Confirm that the scheduled task completed successfully with message similar to: Execute scheduled task: Process content analysis requests (tool_brickfield\task\process_analysis_requests) ... started 01:53:55. Current memory use 17.2 MB. ... used 8 dbqueries ... used 1.8360748291016 seconds Scheduled task complete: Process content analysis requests (tool_brickfield\task\process_analysis_requests)