There is slow issue or freeze issue if you are using HTTPS of Biostar2 connection mode.
It's because that you didn't dowanlod the cerificate to indicate the web page of BioStar2.
Refer the link below and the screenshot.
You should install HTTPS Certiciation install program. Please refer the screenshot below.
- You can also download the certification program from C:\Program Files\BioStar 2(x64)\nginx\html\download\.
(BioStar v2.5 or lower version)