sky11 Posted July 26, 2021 Share Posted July 26, 2021 I was not aware that prestashop 1.7 does not support php 7.4. Today I downgraded my php version from php 7.4 to php 7.3. From then I'm getting Internal Server error 500 when I'm trying to log in from front office. Also I'm not able to login from the back office too. Enabled debug mode and now it is showing some errors. Warning: Use of undefined constant INTL_IDNA_VARIANT_UTS46 - assumed 'INTL_IDNA_VARIANT_UTS46' (this will throw an Error in a future version of PHP) Please help as soon as possible. Link to comment Share on other sites More sharing options...
musicmaster Posted July 26, 2021 Share Posted July 26, 2021 Did you read this: https://github.com/PrestaShop/PrestaShop/pull/11995 Link to comment Share on other sites More sharing options...
SmartDataSoft Posted July 26, 2021 Share Posted July 26, 2021 (edited) Hello, which version of PrestaShop you are using. https://devdocs.prestashop.com/1.7/basics/installation/system-requirements/ You can check your PrestaShop version and php version Thank you Edited July 26, 2021 by SmartDataSoft (see edit history) Link to comment Share on other sites More sharing options...
sky11 Posted July 26, 2021 Author Share Posted July 26, 2021 6 minutes ago, musicmaster said: Did you read this: https://github.com/PrestaShop/PrestaShop/pull/11995 Checked. But didn't understand anything. Can you explain? Link to comment Share on other sites More sharing options...
sky11 Posted July 26, 2021 Author Share Posted July 26, 2021 13 minutes ago, SmartDataSoft said: Hello, which version of PrestaShop you are using. https://devdocs.prestashop.com/1.7/basics/installation/system-requirements/ You can check your PrestaShop version and php version Thank you Prestashop version 1.7.7 PHP version 7.3 Link to comment Share on other sites More sharing options...
musicmaster Posted July 26, 2021 Share Posted July 26, 2021 (edited) 1) your hosting uses a piece of outdated software with the name ICU. You should ask for an update. 2) alternatively apply this fix to your shop: https://www.prestashop.com/forums/topic/1037570-backoffice-doesnt-open/?tab=comments#comment-3289539 Edited July 28, 2021 by musicmaster (see edit history) Link to comment Share on other sites More sharing options...
Shabab Posted July 27, 2021 Share Posted July 27, 2021 14 hours ago, sky11 said: I was not aware that prestashop 1.7 does not support php 7.4. Today I downgraded my php version from php 7.4 to php 7.3. From then I'm getting Internal Server error 500 when I'm trying to log in from front office. Also I'm not able to login from the back office too. Enabled debug mode and now it is showing some errors. Warning: Use of undefined constant INTL_IDNA_VARIANT_UTS46 - assumed 'INTL_IDNA_VARIANT_UTS46' (this will throw an Error in a future version of PHP) Please help as soon as possible. Hi, Actually this is warning screenshot . This is not actual error. Link to comment Share on other sites More sharing options...
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