Click the Manual Install or Import BApp file button and select the file you just downloaded. Troubleshooting Quick Checklist
Some extensions require newer API methods. Go to Help > Check for updates . burp suite failed to download bapp file
Launch Burp from the command line with increased memory allocation using the -Xmx flag. For example, java -Xmx2G -jar burpsuite_pro.jar allocates 2GB of RAM. How to Manually Install a BApp File When the built-in store fails, use this manual bypass: Click the Manual Install or Import BApp file
Some complex extensions (like HTTP Request Smuggler) may fail to install if Burp runs out of memory during the process. the download or installation will fail.
Many BApps are written in Python or Ruby. If you haven't pointed Burp to the necessary standalone .jar files, the download or installation will fail.