How to fix Salesforce OAuth error OAUTH_APPROVAL _ERROR_GENERIC

Salesforce API integrations often encounter the OAUTH_APPROVAL_ERROR_GENERIC error, which disrupts the OAuth authorization flow by preventing users from connecting third-party applications to their Salesforce instance. This error arises due to several reasons, such as security restrictions on Connected Apps, scope mismatches, IP address restrictions, and enforced PKCE requirements in OAuth flows. Diagnosing the issue involves inspecting the URL for specific error parameters, while solutions range from adjusting app installation permissions to updating OAuth configurations. Salesforce admins can resolve these issues by installing apps at the org level, aligning requested and configured scopes, whitelisting IP addresses, and implementing PKCE as needed. Nango is presented as a tool that simplifies the management of such API integrations by handling OAuth flows, providing real-time logging, and offering error alerts, thus reducing the time and effort needed for troubleshooting and integration setup.