Problem Loading UPWORK

I am using 64-Bit Ubuntu 15.10, and trying to install upwork time tracking app for last 5 hours,I was able to install the upwork app but now it's saying THERE WAS A PROBLEM LOADING UPWORK Please check your internet connection and restart the app. I am unable to find the problem. Upwork App log is

[0429/000545:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/000545:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/000547:WARNING:nss_ssl_util.cc(359)] Unknown SSL error -12218 mapped to net::ERR_SSL_PROTOCOL_ERROR
[0429/000936:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/000936:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/000937:WARNING:nss_ssl_util.cc(359)] Unknown SSL error -12218 mapped to net::ERR_SSL_PROTOCOL_ERROR
[0429/001521:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/001521:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/001522:WARNING:nss_ssl_util.cc(359)] Unknown SSL error -12218 mapped to net::ERR_SSL_PROTOCOL_ERROR
[0429/001635:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/001635:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/001637:WARNING:nss_ssl_util.cc(359)] Unknown SSL error -12218 mapped to net::ERR_SSL_PROTOCOL_ERROR
[0429/001804:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/001804:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/001806:WARNING:nss_ssl_util.cc(359)] Unknown SSL error -12218 mapped to net::ERR_SSL_PROTOCOL_ERROR
[0429/002043:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/002043:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/002044:WARNING:nss_ssl_util.cc(359)] Unknown SSL error -12218 mapped to net::ERR_SSL_PROTOCOL_ERROR
[0429/003120:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/003120:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/003121:WARNING:x11_util.cc(1528)] X error received: serial 61, error_code 3 (BadWindow (invalid Window parameter)), request_code 4, minor_code 0 (X_DestroyWindow)
[0429/003121:WARNING:nss_ssl_util.cc(359)] Unknown SSL error -12218 mapped to net::ERR_SSL_PROTOCOL_ERROR
[0429/003141:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/003141:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/003142:WARNING:nss_ssl_util.cc(359)] Unknown SSL error -12218 mapped to net::ERR_SSL_PROTOCOL_ERROR
[0429/121920:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/121920:ERROR:renderer_main.cc(226)] Running without renderer sandbox
[0429/121923:WARNING:nss_ssl_util.cc(359)] Unknown SSL error -12218 mapped to net::ERR_SSL_PROTOCOL_ERROR

Please tell me what is the problem with upwork and how to resolve it.

Thanks

I've found the answer and positing here so that this ans could out help other dev like me.

For Ubuntu 15.10 (32 bit)

sudo dpkg --force-all -r libnss3
wget http://security.ubuntu.com/ubuntu/pool/main/n/nss/libnss3-1d_3.19.2-1ubuntu1_i386.deb 
wget http://security.ubuntu.com/ubuntu/pool/main/n/nss/libnss3-nssdb_3.19.2-1ubuntu1_all.deb
sudo dpkg -i libnss3-1d_3.19.2-1ubuntu1_i386.deb libnss3-nssdb_3.19.2-1ubuntu1_all.deb

For Ubuntu 15.10 (64 bit)

sudo dpkg --force-all -r libnss3
wget http://security.ubuntu.com/ubuntu/pool/main/n/nss/libnss3_3.19.2-1ubuntu1_amd64.deb 
wget http://security.ubuntu.com/ubuntu/pool/main/n/nss/libnss3-nssdb_3.19.2-1ubuntu1_all.deb
sudo dpkg -i libnss3_3.19.2-1ubuntu1_amd64.deb libnss3-nssdb_3.19.2-1ubuntu1_all.deb

To prevent libnss update, no more error after ubuntu update:

sudo apt-mark hold libnss3 libnss3-nssdb

Hope this will work out for everyone.

Thanks