This should be reported to JoomShaper. It's up to extensions to handle compatibility with Joomla! versions. Closing as non-core issue.

@SharkyKZ So installing an extension by a user could possibly corrupt the whole installation? Shouldn't there a rollback feature? Shouldn't joomla extension installation prevent installation wrong/incompatible extensions? Though it's a third party issue - this is a non expected behaviour breaking the backend. Should be considered as feature request rather than closing the ticket.

• Prevent site breaks by detecting incompatible extensions
• Rollback feature if installation goes wrong

Exactly what i thought.

+1

On Fri, 25 Sep 2020, 14:03 github-canni, notifications@github.com wrote:

@SharkyKZ https://github.com/SharkyKZ So installing an extension by a
user could possibly corrupt the whole installation? Shouldn't there a
rollback feature? Shouldn't joomla extension installation prevent
installation wrong/incompatible extensions? Though it's a third party issue

• this is a non expected behaviour breaking the backend. Should be
  considered as feature request rather than closing the ticket.

  • Prevent site breaks by detecting incompatible extensions
  • Rollback feature if installation goes wrong

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This is something for extension developers to implement. We cannot possibly tell whether an extension is compatible or not. This should be done in extension's installation script.

Yes but we are talking about user making mistake and selecting wrong file
for installation which would render his site completely useless.

On Fri, 25 Sep 2020, 14:21 SharkyKZ, notifications@github.com wrote:

This is something for extension developers to implement. We cannot
possibly tell whether an extension is compatible or not. This should be
done in extension's installation script.

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How should Joomla identify if an extension is not compatible with it? Impossible. And if an extension breaks Joomla completely how can a rollback feature help that is also broken then.

The only reliable "rollback" is a backup before installation. Akeeba Backup for Joomla 4 is out for a while now. Therefore no problem to make backups.

This is something for extension developers to implement.

Exactly! The extension must block the installation, not Joomla.