Invalid Screen-broadcasting session

Good day. I am having an issue with my iPad. When attempting to share my screen while using Cisco Webex meetings app or Loom app, I receive the error message that the screen broadcasting has stopped because of an invalid screen broadcasting attempt. It doesn’t matter what app I’m sharing from. I have also seen similar complains when trying to share the iPad screen on websites for other software. However, I have not found any solutions. Please, I really need help with this as I am currently teaching from home and my iPad is my only device. I would appreciate some help. Thank you.