diff --git a/ui/src/app/login/components/login.tsx b/ui/src/app/login/components/login.tsx
index 8662d4c2f132d..db67ff185cf78 100644
--- a/ui/src/app/login/components/login.tsx
+++ b/ui/src/app/login/components/login.tsx
@@ -20,7 +20,7 @@ interface State {
     loginError: string;
     loginInProgress: boolean;
     returnUrl: string;
-    ssoLoginError: string;
+    hasSsoLoginError: boolean;
 }
 
 export class Login extends React.Component<RouteComponentProps<{}>, State> {
@@ -31,13 +31,13 @@ export class Login extends React.Component<RouteComponentProps<{}>, State> {
     public static getDerivedStateFromProps(props: RouteComponentProps<{}>): Partial<State> {
         const search = new URLSearchParams(props.history.location.search);
         const returnUrl = search.get('return_url') || '';
-        const ssoLoginError = search.get('sso_error') || '';
-        return {ssoLoginError, returnUrl};
+        const hasSsoLoginError = search.get('has_sso_error') === 'true';
+        return {hasSsoLoginError, returnUrl};
     }
 
     constructor(props: RouteComponentProps<{}>) {
         super(props);
-        this.state = {authSettings: null, loginError: null, returnUrl: null, ssoLoginError: null, loginInProgress: false};
+        this.state = {authSettings: null, loginError: null, returnUrl: null, hasSsoLoginError: false, loginInProgress: false};
     }
 
     public async componentDidMount() {
@@ -69,7 +69,7 @@ export class Login extends React.Component<RouteComponentProps<{}>, State> {
                                         )}
                                 </button>
                             </a>
-                            {this.state.ssoLoginError && <div className='argo-form-row__error-msg'>{this.state.ssoLoginError}</div>}
+                            {this.state.hasSsoLoginError && <div className='argo-form-row__error-msg'>Login failed.</div>}
                             {authSettings && !authSettings.userLoginsDisabled && (
                                 <div className='login__saml-separator'>
                                     <span>or</span>
diff --git a/util/dex/dex.go b/util/dex/dex.go
index 735b7cbb72976..3f109b225cfc6 100644
--- a/util/dex/dex.go
+++ b/util/dex/dex.go
@@ -3,20 +3,18 @@ package dex
 import (
 	"bytes"
 	"fmt"
-	"html"
 	"io/ioutil"
 	"net/http"
 	"net/http/httputil"
 	"net/url"
 	"path"
-	"regexp"
 	"strconv"
 
+	log "github.com/sirupsen/logrus"
+
 	"github.com/argoproj/argo-cd/v2/util/errors"
 )
 
-var messageRe = regexp.MustCompile(`<p>(.*)([\s\S]*?)<\/p>`)
-
 func decorateDirector(director func(req *http.Request), target *url.URL) func(req *http.Request) {
 	return func(req *http.Request) {
 		director(req)
@@ -44,16 +42,10 @@ func NewDexHTTPReverseProxy(serverAddr string, baseHRef string) func(writer http
 			if err != nil {
 				return err
 			}
-			var message string
-			matches := messageRe.FindSubmatch(b)
-			if len(matches) > 1 {
-				message = html.UnescapeString(string(matches[1]))
-			} else {
-				message = "Unknown error"
-			}
+			log.Errorf("received error from dex: %s", string(b))
 			resp.ContentLength = 0
 			resp.Header.Set("Content-Length", strconv.Itoa(0))
-			resp.Header.Set("Location", fmt.Sprintf("%s?sso_error=%s", path.Join(baseHRef, "login"), url.QueryEscape(message)))
+			resp.Header.Set("Location", fmt.Sprintf("%s?has_sso_error=true", path.Join(baseHRef, "login")))
 			resp.StatusCode = http.StatusSeeOther
 			resp.Body = ioutil.NopCloser(bytes.NewReader(make([]byte, 0)))
 			return nil
diff --git a/util/dex/dex_test.go b/util/dex/dex_test.go
index ffe1fa7862878..42d84465f1b65 100644
--- a/util/dex/dex_test.go
+++ b/util/dex/dex_test.go
@@ -309,7 +309,7 @@ func Test_DexReverseProxy(t *testing.T) {
 		assert.Equal(t, http.StatusSeeOther, resp.StatusCode)
 		location, _ := resp.Location()
 		fmt.Printf("%s %s\n", resp.Status, location.RequestURI())
-		assert.True(t, strings.HasPrefix(location.RequestURI(), "/login?sso_error"))
+		assert.True(t, strings.HasPrefix(location.RequestURI(), "/login?has_sso_error=true"))
 	})
 
 	t.Run("Invalid URL for Dex reverse proxy", func(t *testing.T) {