[BUG] Asset Store Preview ver 2018.3.0b7

Good day, I am new to Unity and decided to take the beta route, this was a first run error and continued afterwards.

I opened the prefabs - asset store, upon loading the asset I resized the Asset Store Preview, since then, when I load any assets it turns pink (like an unknown object)

Here are pictures for better understanding





I am very new to this, if there are any edits or questions I am happy to assist
Any news on this bug?

Could you please submit a bug report with reproduction steps for this issue?