I am wondering if I perhaps misunderstood your reply, I am thinking that you are saying you have found the problem that caused the error (likely an identical part already in the parts bin) and fixed that and are now asking how to find the display 16x20 LCD i2c and Arduino UNO R4 WIFI for Fritzing. If this is the request then this should work: a google search of the form “fritzing part 16x20 display LCD i2c” turns up this post which point to the post with the requested part (and is in general the best way to find parts.)
similarly a search for “fritzing part Arduino UNO R4 WIFI” turns up this post which should be what you want.
Peter