Handle V1 connection refused when getting v1 subscription

services/web/app/coffee/Features/Project/ProjectController.coffee

@@ -27,6 +27,7 @@ CollaboratorsHandler = require '../Collaborators/CollaboratorsHandler'
 Modules = require '../../infrastructure/Modules'
 ProjectEntityHandler = require './ProjectEntityHandler'
 crypto = require 'crypto'
+{ V1ConnectionError } = require '../Errors/Errors'
 
 module.exports = ProjectController =
 
@@ -183,7 +184,10 @@ module.exports = ProjectController =
 						return cb(null, projects: [], tags: [], noConnection: true)
 					return cb(error, projects[0]) # hooks.fire returns an array of results, only need first
 			hasSubscription: (cb)->
-				LimitationsManager.userHasSubscriptionOrIsGroupMember currentUser, cb
+				LimitationsManager.userHasSubscriptionOrIsGroupMember currentUser, (error, hasSub) ->
+					if error? and error instanceof V1ConnectionError
+						return cb(null, true)
+					return cb(error, hasSub)
 			user: (cb) ->
 				User.findById user_id, "featureSwitches overleaf awareOfV2 features", cb
 			}, (err, results)->

services/web/app/coffee/Features/Subscription/V1SubscriptionManager.coffee

@@ -2,6 +2,7 @@ UserGetter = require "../User/UserGetter"
 request = require "request"
 settings = require "settings-sharelatex"
 logger = require "logger-sharelatex"
+{ V1ConnectionError } = require "../Errors/Errors"
 
 module.exports = V1SubscriptionManager =
 	# Returned planCode = 'v1_pro' | 'v1_pro_plus' | 'v1_student' | 'v1_free' | null
@@ -58,7 +59,10 @@ module.exports = V1SubscriptionManager =
 				json: true,
 				timeout: 5 * 1000
 			}, (error, response, body) ->
-				return callback(error) if error?
+				if error?
+					# Specially handle no connection err, so warning can be shown
+					error = new V1ConnectionError('No V1 connection') if error.code == 'ECONNREFUSED'
+					return callback(error)
 				if 200 <= response.statusCode < 300
 					return callback null, body
 				else