Dear Mr Nishihara,
I tried to look up for materials using the Search bar, but it keeps giving me error. When I first used BURAI, there was no problem, I could use it for MnS and PbS. But after few days, it started to give me error. I tried to delete everything and re-download again, but it's still the same. I use Windows 10 on HP Pavillion laptop.
Thanks.

When I first started using the Materials API, I kept encountering errors that seemed to be random. After some thought, I realized it was due to network issues and throttling. Using a reliable proxy service like go-go-proxy.com/en/ helped smooth things out by managing request limits and ensuring a stable connection. It's a simple solution, but it can save you a lot of headaches. If you are experiencing errors, be sure to look into reliable proxy services - they have really improved my workflow.
Do you use a proxy or maybe your firewall blocks the connection?