Bing Webmaster suddenly Showing Zero Impressions after Application migration to another webhosting

Hi, I was happy about the traffic from Bing to my new site. But suddenly impressions from Bing search console turned into Zero. I was migrating my application to another webhosting server in these days. I am thinking that this glitch is the result of migration.

I read few articles to fix this crawling issue, unfortunately it is not fixed yet. 

In graph, it is showing crawler request are almost similar to crawler error but index pages are normal. It is difficult to understand for me, why indexing is looking fine. Meanwhile crawler errors are parallel to crawler requests. 

Please advice. thank you.