@Eric902 I'm curious as to the type of event you are having and why you are being rejected because of it. Are you not reading thoroughly through the listing information before trying to Instant Book? (like maybe you want to have a party and it says No Parties in the House Rules? )
You can avoid these kinds of scenarios by making sure you really read all the host has to say about their place and the rules, maximum number of guests allowed, etc. and contacting the host BEFORE booking to find out if the listing will be suitable for your needs.
Also, I can tell you that hosts want to see a clear profile photo of their guests- not something taken from afar where you are unrecognizable. Even more so when you are new to the platform and have no reviews yet. Hosts are allowing perfect strangers onto their property and expect to be able to recognize that the person who shows up at the door is the same person who booked.