The main app is Flutter based so I am not using the previews feature. I will try to send you the diagnostics.

All pods were downloaded but I will try to fix warnings to see if it helps.

Understand. I may use the longest term for start. So my other question is, I am planning to give discounts for certain groups for example employees of a particular company or members of an particular association. I thought I may give them a special code like BIGDSCNTFOROURCOMPANY and any one who has this code is eligible for discount. Can I do this?