E3372 USB Modem not working issue on Fedora 26

Today I installed Fedora 26 on my Laptop (HP EliteBook).  After that I wanted to connect my USB Modem E3372 to connect to the internet. Ah! Surprise!! It didn't work. Whenever I tried to enable the connection through the GUI, it stopped connecting immediately. This modem had no issues with Fedora 25 installed on my Desktop.

After analyzing the logs (journalctl -xe) I was able to find the issue.  Actually a required plugin was not installed with the OS installation or even with the dnf upgrade I did after the OS installation.

Oct 20 17:21:57 localhost.localdomain NetworkManager[739]: <info>  [1508534517.2585] device (ttyUSB0): state change: config -> ip-config (reason 'none', internal state 'managed')
Oct 20 17:21:57 localhost.localdomain NetworkManager[739]: <warn>  [1508534517.2586] device (ttyUSB0): interface ttyUSB1 not up for IP configuration
Oct 20 17:21:57 localhost.localdomain NetworkManager[739]: <info>  [1508534517.2586] (ttyUSB0): using modem-specified IP timeout: 20 seconds
Oct 20 17:21:57 localhost.localdomain NetworkManager[739]: <error> [1508534517.2587] (ttyUSB0): error starting PPP: the PPP plugin /usr/lib64/NetworkManager/libnm-ppp-plugin.so is not installed
Oct 20 17:21:57 localhost.localdomain NetworkManager[739]: <info>  [1508534517.2588] device (ttyUSB0): state change: ip-config -> failed (reason 'ppp-start-failed', internal state 'managed')
Oct 20 17:21:57 localhost.localdomain NetworkManager[739]: <warn>  [1508534517.2593] device (ttyUSB0): Activation: failed for connection

The library is provided by a package called NetworkManager-ppp

dnf provides /usr/lib64/NetworkManager/libnm-ppp-plugin.so
Last metadata expiration check: 1:06:38 ago on Fri 20 Oct 2017 04:27:22 PM EDT.
NetworkManager-ppp-1:1.8.2-1.fc26.x86_64 : PPP plugin for NetworkManager
Repo        : updates
Matched from:
Filename    : /usr/lib64/NetworkManager/libnm-ppp-plugin.so

NetworkManager-ppp-1:1.8.0-6.fc26.x86_64 : PPP plugin for NetworkManager
Repo        : fedora
Matched from:
Filename    : /usr/lib64/NetworkManager/libnm-ppp-plugin.so


Then I installed the package

[root@localhost ~]# dnf install  NetworkManager-ppp

Here we go. The modem started to working.!!!