deployment error Vercel Error occurred prerendering page Error: @supabase/ssr: Your project’s URL and API key are required to create a Supabase clien

by

Summary The deployment failed during the Static Site Generation (SSG) prerender phase in Next.js, specifically when attempting to render the /admin/Expertise page. The build process crashed because the Supabase client library (@supabase/ssr) attempted to initialize a client instance without the required environment variables (NEXT_PUBLIC_SUPABASE_URL and NEXT_PUBLIC_SUPABASE_ANON_KEY). Because these values were missing or undefined at build … Read more

How to copy the response form GitHub Copilot in VS Code?

by

Summary The user is asking how to copy the response from GitHub Copilot in VS Code while preserving the Markdown formatting. The core issue is that GitHub Copilot in VS Code lacks a dedicated “copy” button like Cursor, making it non-trivial to extract the full response without losing formatting. Root Cause GitHub Copilot’s UI Design: … Read more

Kernel independent component analysis

by

Summary The kernel independent component analysis (ICA) is a technique used to separate mixed signals into their original sources. In the context of the question, the user is seeking R code for kernel ICA and information on the required package. The kernel ICA process involves using a kernel function to map the data into a … Read more

The type or namespace name ‘OpenApiReference’ could not be found (are you missing a using directive or an assembly reference?)

by

Summary A .NET 10 developer encountered a compilation error indicating that the type OpenApiReference could not be found while attempting to configure Swagger authentication. The error was triggered by attempting to instantiate Microsoft.OpenApi.Models.OpenApiReference directly in the SwaggerGen configuration, assuming this class was available in the standard Swagger package. This postmortem analyzes why the OpenApiReference class … Read more

Properly replicating conditions of an array as parameters for a post action

by

Summary A common pitfall in Rails controller tests arises when defining array parameters for redirection assertions. The core issue is that the test setup incorrectly represents the parameter structure being sent, leading to a mismatch in the URL query string generation. This results in an expected URL that contains a double array notation (acc_ids[][]) instead … Read more

How to debug Memory Quota Exceed Errors

by

Summary The “memory quota exceeded” error on Heroku dynos occurs when your Node.js process exceeds the allocated memory limit (typically 512MB for a standard-1x dyno). This issue is often triggered by inefficient database queries, improper caching strategies, and lack of garbage collection optimization. The problem is rarely about the raw number of rows (600 is … Read more

Having Trouble With Browser-Based Visual Studio Code

by

Summary The issue at hand is the inability to use Live Preview in browser-based Visual Studio Code and the failure to view HTML files in a browser by double-clicking them. The browser-based Visual Studio Code has limitations compared to its desktop counterpart, and understanding these limitations is key to resolving the issue. Root Cause The … Read more

DatabaseError(1020, “1020 (HY000): Record has changed since last read in table ‘db_control'”

by

Summary A Python script using MariaDB began failing with DatabaseError(1020, “Record has changed since last read in table ‘db_control'”) after an upgrade to MariaDB 11.8.3 on Raspberry Pi OS Trixie. The root cause was identified as the default enabling of innodb_snapshot_isolation in this MariaDB version. This change alters how transaction isolation handles concurrent modifications, causing … Read more

How to display JavaScript output to my html?

by

Summary The issue at hand is displaying JavaScript output to an HTML page. The user has a JavaScript function that performs a math computation and wants to visualize the result on the front page when a button is pressed. However, the output is either undefined or nothing shows up. Root Cause The root cause of … Read more