When adding web parts to a page (especially custom developed web parts), the page can stop working due to errors in the web part. I have expereinced this many times when you install a web part for the first time. Deleting or removing the web part can be difficult when this type of error occurs. Fear not, there is a back door, to removing this rogue web part. On the end of the URL of the page add “?contents=1”. This will bring up a maintenance page allowing you to close or delete the web part that has not worked as intended.
Happy SharePointing Y’all 🙂