Debian Upgraded to 6.2 Pro && Stuck in SSL fail with S3 storage backend(HTTPS)

Upgraded to 6.2 Pro && Stuck in SSL fail with S3 storage backend(HTTPS)

So this is the seafile.log

[12/17/17 12:51:28] …/common/s3-client.c(552): [S3] libcurl failed to get bucket-fs:df0d4830927d053f6e762da97d2466091fb894dc: Problem with the SSL CA cert (path? access rights?).
[12/17/17 12:51:28] …/common/s3-client.c(552): [S3] libcurl failed to get bucket-fs:df0d4830927d053f6e762da97d2466091fb894dc: Problem with the SSL CA cert (path? access rights?).
[12/17/17 12:51:28] …/common/s3-client.c(552): [S3] libcurl failed to get bucket-fs:df0d4830927d053f6e762da97d2466091fb894dc: Problem with the SSL CA cert (path? access rights?).
[12/17/17 12:51:28] …/common/fs-mgr.c(1893): [fs mgr] Failed to read dir df0d4830927d053f6e762da97d2466091fb894dc.

Before,I did this and it worked well(https://manual.seafile.com/deploy_pro/setup_with_amazon_s3.html).
But when I tried this newest seafile-server and this time I got stuck.
Feel afraid to touch CA stuff cause I don’t want to risk to destroy the system,So seeking for help now.Thanks!Anyone could give a gentle hand?

Plus,I can make it work except configure the https,but only use http.What a danger!

~# apt-cache search libcurl

libcupt4-1-downloadmethod-curl - flexible package manager – libcurl download method
libcurl3 - easy-to-use client-side URL transfer library (OpenSSL flavour)
libcurl3-dbg - debugging symbols for libcurl (OpenSSL, GnuTLS and NSS flavours)
libcurl3-gnutls - easy-to-use client-side URL transfer library (GnuTLS flavour)
libcurl3-nss - easy-to-use client-side URL transfer library (NSS flavour)
libcurl4-doc - documentation for libcurl
libcurl4-gnutls-dev - development files and documentation for libcurl (GnuTLS flavour)
libcurl4-nss-dev - development files and documentation for libcurl (NSS flavour)
libcurl4-openssl-dev - development files and documentation for libcurl (OpenSSL flavour)
fp-units-net - Free Pascal - networking units dependency package
fp-units-net-3.0.0 - Free Pascal - networking units
gnupg1 - GNU privacy guard - a PGP implementation (deprecated “classic” version)
gnupg1-curl - GNU privacy guard (cURL helpers for deprecated “classic” version)
libghc-curl-dev - GHC libraries for the libcurl Haskell bindings
libghc-curl-doc - Documentation for the libcurl Haskell bindings; documentation
libghc-curl-prof - Profiling libraries for the libcurl Haskell bindings; profiling libraries
libghc-hxt-curl-dev - LibCurl interface for HXT
libghc-hxt-curl-doc - LibCurl interface for HXT; documentation
libghc-hxt-curl-prof - LibCurl interface for HXT; profiling libraries
libjsonrpccpp-client0 - library implementing json-rpc C++ clients
libjsonrpccpp-client0-dbg - debugging symbols for libjsonrpccpp-client0
libwww-curl-perl - Perl bindings to libcurl
lua-curl - libcURL bindings for the Lua language
lua-curl-dev - libcURL development files for the Lua language
libcurl-ocaml - OCaml curl bindings (Runtime Library)
libcurl-ocaml-dev - OCaml libcurl bindings (Development package)
python-pycurl - Python bindings to libcurl
python-pycurl-dbg - Python bindings to libcurl (debug extension)
python-pycurl-doc - Python bindings to libcurl (documentation)
python3-pycurl - Python bindings to libcurl (Python 3)
python3-pycurl-dbg - Python bindings to libcurl (debug extension, Python 3)
r-cran-curl - GNU R modern and flexible web client for R
libresource-retriever-dev - Robot OS resource_retriever library - development files
libresource-retriever0d - Robot OS resource_retriever library
python-resource-retriever - Robot OS resource_retriever library - Python
ruby-curb - Ruby libcurl bindings
ruby-ethon - libcurl wrapper using ffi
ruby-typhoeus - parallel HTTP library on top of ethon
libstrongswan-extra-plugins - strongSwan utility and crypto library (extra plugins)
tclcurl - Tcl bindings to libcurl
wmget - Background download manager in a Window Maker dock app
fp-units-net-3.0.4 - Free Pascal - networking units