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Fatal Error When Using MainWP Child with BackWPup v5.2.2 (get_instance() Method Missing) #789

@bkatusic

Description

@bkatusic

Description of Issue:

After updating to BackWPup v5.2.2, sites using the MainWP Child plugin crash due to a fatal error. The crash is caused by a call to a get_instance() method on the BackWPup class, which no longer exists in BackWPup v5.2.2.
This issue does not affect BackWPup v5.2.1. and earlier.
A hotfix is planned.

Steps to Reproduce:

  1. Install or update BackWPup to version 5.2.2.
  2. Activate the MainWP Child plugin.
  3. Reload the site frontend or backend.
  4. Observe a fatal error due to BackWPup::get_instance() being undefined.

Note

If you have a similar issue but the steps to reproduce are different, please open a help ticket for us to review and verify if it's a new issue or part of this one. Thanks!

Reported on: 2025-05-20
Issue confirmed with dev team: 2025-05-20
Resolved: Pending

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