The problem after upgrade 3.68

when I upgrade to 3.68 from 3.34,the core function is well,but,when I browse the npm repository,The following errors often occur on the web side:

after 10 secends, the function is recover。Other types of repository will not encounter the above problem.
Does anyone know what the reason is?

I’d suggest taking a look at the servers log which may contain more specific information.