diff --git a/services/web/app/coffee/Features/Captcha/CaptchaMiddleware.coffee b/services/web/app/coffee/Features/Captcha/CaptchaMiddleware.coffee
index 4a3ce18b5e..5a846ff839 100644
--- a/services/web/app/coffee/Features/Captcha/CaptchaMiddleware.coffee
+++ b/services/web/app/coffee/Features/Captcha/CaptchaMiddleware.coffee
@@ -16,6 +16,8 @@ module.exports = CaptchaMiddleware =
 			return next(error) if error?
 			if !body?.success
 				logger.warn {statusCode: response.statusCode, body: body}, 'failed recaptcha siteverify request'
-				return res.sendStatus 400
+				return res.status(400).send({errorReason:"cannot_verify_user_not_robot", message:
+					{text:"Sorry, we could not verify that you are not a robot. Please check that Google reCAPTCHA is not being blocked by an ad blocker or firewall."}
+				})
 			else
 				return next()
diff --git a/services/web/app/coffee/Features/Collaborators/CollaboratorsInviteController.coffee b/services/web/app/coffee/Features/Collaborators/CollaboratorsInviteController.coffee
index 28f0cbb5ee..898abe52bb 100644
--- a/services/web/app/coffee/Features/Collaborators/CollaboratorsInviteController.coffee
+++ b/services/web/app/coffee/Features/Collaborators/CollaboratorsInviteController.coffee
@@ -65,7 +65,7 @@ module.exports = CollaboratorsInviteController =
 			email = EmailHelper.parseEmail(email)
 			if !email? or email == ""
 				logger.log {projectId, email, sendingUserId}, "invalid email address"
-				return res.sendStatus(400)
+				return res.status(400).send({errorReason:"invalid_email"})
 			CollaboratorsInviteController._checkRateLimit sendingUserId, (error, underRateLimit) ->
 				return next(error) if error?
 				if !underRateLimit
diff --git a/services/web/app/views/project/editor/share.pug b/services/web/app/views/project/editor/share.pug
index 98568df122..a5430d710a 100644
--- a/services/web/app/views/project/editor/share.pug
+++ b/services/web/app/views/project/editor/share.pug
@@ -185,6 +185,8 @@ script(type='text/ng-template', id='shareProjectModalTemplate')
 				span(ng-switch="state.errorReason")
 					span(ng-switch-when="cannot_invite_non_user")
 						| #{translate("cannot_invite_non_user")}
+					span(ng-switch-when="cannot_verify_user_not_robot")
+						| #{translate("cannot_verify_user_not_robot")}
 					span(ng-switch-when="cannot_invite_self")
 						| #{translate("cannot_invite_self")}
 					span(ng-switch-when="invalid_email")
diff --git a/services/web/public/coffee/ide/share/controllers/ShareProjectModalController.coffee b/services/web/public/coffee/ide/share/controllers/ShareProjectModalController.coffee
index 0c16dcbb39..b26bef3c06 100644
--- a/services/web/public/coffee/ide/share/controllers/ShareProjectModalController.coffee
+++ b/services/web/public/coffee/ide/share/controllers/ShareProjectModalController.coffee
@@ -127,11 +127,13 @@ define [
 								# with new collaborator information.
 								addNextMember()
 							, 0
-						.catch (err) ->
+						.catch (httpResponse) ->
+							{data, status, headers, config } = httpResponse
 							$scope.state.inflight = false
 							$scope.state.error = true
-							if err.status? and err.status == 400
-								$scope.state.errorReason = 'invalid_email'
+
+							if data?.errorReason?
+								$scope.state.errorReason = data?.errorReason
 							else
 								$scope.state.errorReason = null