An uncaught Exception was encountered

Type: InvalidArgumentException

Message: URI must be a string or UriInterface

Filename: /home/cron/public_html/vendor/guzzlehttp/psr7/src/Utils.php

Line Number: 457

Backtrace:

File: /home/cron/public_html/vendor/guzzlehttp/guzzle/src/Client.php
Line: 160
Function: uriFor

File: /home/cron/public_html/vendor/guzzlehttp/guzzle/src/Client.php
Line: 187
Function: requestAsync

File: /home/cron/public_html/application/controllers/Api.php
Line: 27
Function: request

File: /home/cron/public_html/vendor/chriskacerguis/codeigniter-restserver/src/RestController.php
Line: 583
Function: call_user_func_array

File: /home/cron/public_html/index.php
Line: 318
Function: require_once