# "Not Found" message when open an App **URL:** \ **Category:** Report a Bug\ **Created:** [March 29, 2023, 7:22am UTC](https://community.glideapps.com/t/not-found-message-when-open-an-app/59831 "2023-03-29T07:22:10Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![TeamDigitale](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/teamdigitale/32/13473_2.png) [@TeamDigitale](https://community.glideapps.com/u/TeamDigitale)\ **Post date:** [March 29, 2023, 7:22am UTC](https://community.glideapps.com/t/not-found-message-when-open-an-app/59831/1 "2023-03-29T07:22:10Z")
From a couples of days a lot of users, when they try to open my App [http://mycampusdavinci.it/](http://mycampusdavinci.it/) they receive a blank screen with only a Not Found message on the left top corner. if they try to reopen the app the receive the same message until suddenly, all starts to works again and they are able to use the App What has been wrong ? Thanks in advance ---
**Author:** ![Darren\_Murphy](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/darren_murphy/32/47326_2.png) [@Darren\_Murphy](https://community.glideapps.com/u/Darren_Murphy)\ **Post date:** [March 29, 2023, 7:27am UTC](https://community.glideapps.com/t/not-found-message-when-open-an-app/59831/2 "2023-03-29T07:27:39Z")
Do you see any errors when you look at your Custom Domain configuration in Glide? ---
**Author:** ![TeamDigitale](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/teamdigitale/32/13473_2.png) [@TeamDigitale](https://community.glideapps.com/u/TeamDigitale)\ **Post date:** [March 29, 2023, 8:02am UTC](https://community.glideapps.com/t/not-found-message-when-open-an-app/59831/3 "2023-03-29T08:02:24Z")
Hi Darren, no there’s no problem in domain’s config and no domain’s error Only some users are affected by this weird behaviour and not always. If they reload the page after a while it all works again. Thanks again ---
**Author:** ![Darren\_Murphy](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/darren_murphy/32/47326_2.png) [@Darren\_Murphy](https://community.glideapps.com/u/Darren_Murphy)\ **Post date:** [March 29, 2023, 8:11am UTC](https://community.glideapps.com/t/not-found-message-when-open-an-app/59831/4 "2023-03-29T08:11:09Z")
Okay, so just to confirm, when you look at your Custom Domain configuration you see all green ticks as per the below example, yes? ![CleanShot 2023-03-29 at 16.03.51@2x](https://us1.discourse-cdn.com/flex002/uploads/glideapps/original/3X/9/d/9d7b1b737db1ea87e970fc5b6644357a11ada839.png) The `Not Found` error occurs when the Glide App URL cannot be found. There can be several reasons for this, but if it’s an intermittent failure that usually points to a DNS related issue. The reason I asked that you check your Custom DNS configuration is that Glide recently made some changes that impacted a small number of users with Custom Domains, causing them to become “misconfigured”, and the fix was to reconfigure those Custom Domains. If that’s not the case with your App, I would still suspect that it’s a DNS related failure. What you will probably find is that if you use the Glide generated URL (`.....glideapps.io`) it will work. ---
**Author:** ![TeamDigitale](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/teamdigitale/32/13473_2.png) [@TeamDigitale](https://community.glideapps.com/u/TeamDigitale)\ **Post date:** [March 29, 2023, 9:00am UTC](https://community.glideapps.com/t/not-found-message-when-open-an-app/59831/5 "2023-03-29T09:00:46Z")
Hi Darren, thanks for the directions. You were right. The DNS’s configurations params were wrong, but this is very strange since my app has run for more than 3 years without problems. Could it be a problem related to the transition between “old” app to “Classic” App in Glide ? Thanks again Stefano ---
**Author:** ![Darren\_Murphy](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/darren_murphy/32/47326_2.png) [@Darren\_Murphy](https://community.glideapps.com/u/Darren_Murphy)\ **Post date:** [March 29, 2023, 9:14am UTC](https://community.glideapps.com/t/not-found-message-when-open-an-app/59831/6 "2023-03-29T09:14:30Z")
No, it’s not directly related to the Apps transition, but rather to an audit that Glide did a little while back. You can find more information about it below: > [@"Not Found" page](https://community.glideapps.com/t/not-found-page/58352/5): > > Glide has recently begun auditing custom hostnames. For the vast majority of Apps with custom hostnames this process will be invisible. However, we are finding some Apps with custom hostnames which are improperly configured, may not be working. @qb15 In this specific case you need to remove the AAAA records, and delete one of the A records. The remaining A record needs to change to the value you see on Step 2. But most importantly, is it working for you now? ---
**Author:** ![TeamDigitale](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/teamdigitale/32/13473_2.png) [@TeamDigitale](https://community.glideapps.com/u/TeamDigitale)\ **Post date:** [March 29, 2023, 9:35am UTC](https://community.glideapps.com/t/not-found-message-when-open-an-app/59831/7 "2023-03-29T09:35:17Z")
Yes, all works fine now, i have green-light everywhere. Thanks a lot again for your great support Stefano ---
**Author:** ![system](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/system/32/53398_2.png) [@system](https://community.glideapps.com/u/system)\ **Post date:** [March 30, 2023, 9:35am UTC](https://community.glideapps.com/t/not-found-message-when-open-an-app/59831/8 "2023-03-30T09:35:22Z")
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