Error: Class 'Symfony\Component\ClassLoader\Psr4ClassLoader' not found in include_once() (line 25 of /Users/gauravmahlawat/Desktop/devdesktop/contribution/d9contri/web/modules/backup_migrate/backup_migrate.module)
Adding screenshot for reference.

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Screenshot 2020-11-01 at 15.29.17.png251.87 KBgauravvvv

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Gauravmahlawat created an issue. See original summary.

timotej-pl’s picture

timotej-pl commented
Related issues: +#3051092: Drupal 9 Deprecated Code Report

Looks like this issue was already addressed in Issue 3051092. The patch covers multiple deprecated parts of code, but should also fixed problems with Psr4ClassLoader which is deprecated since Symfony 3.3 and is removed in 4.0.

damienmckenna’s picture

damienmckenna
Location TN, USA
commented
Status: Active » Closed (duplicate)
Parent issue: » #3051092: Drupal 9 Deprecated Code Report
Related issues: -#3051092: Drupal 9 Deprecated Code Report