1. Error installing Crashlytics while executing pod install

[!] Error installing Crashlytics

[!] /usr/bin/curl -f -L -o /var/folders/9s/nd8qhc8j5yz7qlrqxm40g4480000gp/T/d20181219-67298-1nuz78y/file.zip https://kit-downloads.fabric.io/cocoapods/crashlytics/3.12.0/crashlytics.zip --create-dirs --netrc-optional

% Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

Dload  Upload   Total   Spent    Left  Speed

0     0    0     0    0     0      0      0 --:--:--  0:00:30 --:--:--     0

curl: (35) LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to kit-downloads.fabric.io:443

Solution:

(Make sure you are using external net connection)

(Make sure your git have no http/https proxy)

step1: rm -rf Pods (remove all the pods in repository)

step2: pod install (reinstall it)