Hi koders I have a problem I want to make a button that join a WhatsApp group when user click but the link not working even I write link in this format “"link"” and also block are correct,not for this only all links that I have write in firebase are not working please help!!! 
It would really help if you provided a screenshot your relevant blocks, so we can see what you are trying to do, and where the problem may be.
To get an image of your blocks, right click in the Blocks Editor and select “Download Blocks as Image”. You might want to use an image editor to crop etc. if required. Then post it here in the community.
Taifun