How to fix Salesforce OAuth error OAUTH_APPROVAL _ERROR_GENERIC

When integrating Salesforce API, the OAUTH_APPROVAL_ERROR_GENERIC error often arises during the OAuth authorization process, hindering the connection of third-party applications to Salesforce. This error is typically caused by several factors, including security restrictions on Connected Apps, mismatched OAuth scopes, IP address limitations, and Sandbox licensing issues. Diagnosing the root cause involves examining the URL for error parameters, which can indicate issues such as uninstalled apps, scope mismatches, or IP restrictions. Solutions include installing the app at the org level, aligning requested scopes, adjusting IP policies, and implementing PKCE to comply with recent Salesforce updates. Nango is highlighted as an open-source platform that simplifies managing API integrations, offering pre-built primitives and real-time logging to streamline Salesforce API connections.