# Problem opening application on iPhone

**URL:** <https://community.glideapps.com/t/problem-opening-application-on-iphone/58815>\
**Category:** Ask for Help\
**Created:** [March 6, 2023, 11:02am UTC](https://community.glideapps.com/t/problem-opening-application-on-iphone/58815 "2023-03-06T11:02:17Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Andreasita](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/andreasita/32/23148_2.png) [@Andreasita](https://community.glideapps.com/u/Andreasita)\
**Post date:** [March 6, 2023, 11:02am UTC](https://community.glideapps.com/t/problem-opening-application-on-iphone/58815/1 "2023-03-06T11:02:17Z")

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Hi everyone,  
Since yesterday we have been experiencing a problem opening the application on many iPhone users. In practice they find themselves with a white screen and the wording “Not Found”. Users located in Italy say they have done a system update.  
Thanks for your attention

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**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 6, 2023, 11:21am UTC](https://community.glideapps.com/t/problem-opening-application-on-iphone/58815/2 "2023-03-06T11:21:47Z")

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Are you using a custom domain?

If yes, please check your custom domain configuration in Glide.

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**Author:** ![Andreasita](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/andreasita/32/23148_2.png) [@Andreasita](https://community.glideapps.com/u/Andreasita)\
**Post date:** [March 6, 2023, 12:10pm UTC](https://community.glideapps.com/t/problem-opening-application-on-iphone/58815/3 "2023-03-06T12:10:32Z")

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Hi Darren  
Thank you for your answer.  
Have a nice day

Andreas

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**Author:** ![benmitchell](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/benmitchell/32/13820_2.png) [@benmitchell](https://community.glideapps.com/u/benmitchell)\
**Post date:** [March 6, 2023, 4:14pm UTC](https://community.glideapps.com/t/problem-opening-application-on-iphone/58815/4 "2023-03-06T16:14:33Z")

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I’ve just had the same issue. Not sure why I need to reconfigure the custom domain as it’s been working fine for the last 2 years.

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**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 6, 2023, 4:26pm UTC](https://community.glideapps.com/t/problem-opening-application-on-iphone/58815/5 "2023-03-06T16:26:14Z")

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See 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.