Exception: Argument 3 passed to OCP\AppFramework\Http\TemplateResponse::__construct() must be of the type array, string given, called in /var/www/nextcloud/apps/oauth2/lib/Controller/LoginRedirectorController.php on line 88

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Steps to reproduce

1. Attempt to use OAuth login from Rocket Chat

Expected behaviour

Login window appears and functions

Actual behaviour

Window appears, says "Internal Server Error: The server was unable to complete your request. If this happens again, please send the technical details below to the server administrator. More details can be found in the server log."

Server log contains line: "Exception: Argument 3 passed to OCP\AppFramework\Http\TemplateResponse::__construct() must be of the type array, string given, called in /var/www/nextcloud/apps/oauth2/lib/Controller/LoginRedirectorController.php on line 88"

Server configuration

Operating system: Ubuntu 18.04.4 LTS

Web server: nginx 1.16.1

Database: psql (PostgreSQL) 10.12 (Ubuntu 10.12-0ubuntu0.18.04.1)

PHP version: PHP 7.2.24-0ubuntu0.18.04.3 (cli) (built: Feb 11 2020 15:55:52) ( NTS )

Nextcloud version: 18.0.2

Where did you install Nextcloud from:
nextcloud.com

Log:

Exception: Argument 3 passed to OCP\AppFramework\Http\TemplateResponse::__construct() must be of the type array, string given, called in /var/www/nextcloud/apps/oauth2/lib/Controller/LoginRedirectorController.php on line 88/var/www/nextcloud/lib/private/AppFramework/App.php - line 125: OC\AppFramework\Http\Dispatcher->dispatch(OCA\OAuth2\C ... {}, "authorize")/var/www/nextcloud/lib/private/AppFramework/Routing/RouteActionHandler.php - line 47: OC\AppFramework\App::main("OCA\OAuth2 ... r", "authorize", OC\AppFramew ... {}, { _route: "o ... "})<>OC\AppFramework\Routing\RouteActionHandler->__invoke({ _route: "o ... "})/var/www/nextcloud/lib/private/Route/Router.php - line 299: call_user_func(OC\AppFramew ... {}, { _route: "o ... "})/var/www/nextcloud/lib/base.php - line 1008: OC\Route\Router->match("/apps/oauth2/authorize")/var/www/nextcloud/index.php - line 38: OC::handleRequest()Caused by TypeError: Argument 3 passed to OCP\AppFramework\Http\TemplateResponse::__construct() must be of the type array, string given, called in /var/www/nextcloud/apps/oauth2/lib/Controller/LoginRedirectorController.php on line 88/var/www/nextcloud/apps/oauth2/lib/Controller/LoginRedirectorController.php - line 88: OCP\AppFramework\Http\TemplateResponse->__construct("core", "404", "guest")/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 170: OCA\OAuth2\Controller\LoginRedirectorController->authorize("", "eyJsb2dpblN ... =", "code")/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 99: OC\AppFramework\Http\Dispatcher->executeController(OCA\OAuth2\C ... {}, "authorize")/var/www/nextcloud/lib/private/AppFramework/App.php - line 125: OC\AppFramework\Http\Dispatcher->dispatch(OCA\OAuth2\C ... {}, "authorize")/var/www/nextcloud/lib/private/AppFramework/Routing/RouteActionHandler.php - line 47: OC\AppFramework\App::main("OCA\OAuth2 ... r", "authorize", OC\AppFramew ... {}, { _route: "o ... "})<>OC\AppFramework\Routing\RouteActionHandler->__invoke({ _route: "o ... "})/var/www/nextcloud/lib/private/Route/Router.php - line 299: call_user_func(OC\AppFramew ... {}, { _route: "o ... "})/var/www/nextcloud/lib/base.php - line 1008: OC\Route\Router->match("/apps/oauth2/authorize")/var/www/nextcloud/index.php - line 38: OC::handleRequest()

Screenshots: