Usually cannot use jabref to perform web search

I have installed jabref 5.2 (Win64). I cannot add entry using an id. When I add entry using an DOI (10.1038/s41467-018-06303-0), an error raised.
When I use Web Search to search FRB on ArXiv, an error raised.
However, I can use Web Search to search FRB on ADS.
When I “Update with bibliographic information from the web”, usually an error raised. If i use ADS, sometimes it works, sometimes it dosen’t