Route "migrate_drupal_ui.upgrade" does not exist

Hi @quietone,

This is not experienceable on a fresh install. This happens when migrate_drupal_ui has perviously been installed, then is unistall some time, and then re-enabled again. The module admin_toolbar, dblog and devel modules may increase the chances of this issue.

Thanks.

I have experienced this issue with the Fresh Install.. I was installing modules one by one and when I came to "migrate_ui" module, faced this issue. Applied the changes suggested in given patch manually, and it worked like a charm.

@sandip27, can you proved the exact steps so that I can reproduce the problem?

Hello @quietone,

Basic Details of System -

• Drupal Version : 9.5.10
• PHP Version : 8.2.4
• Database System : MySQL, Percona Server, or equivalent
• Database Version : 8.0.32
• Web Server : Apache/2.4.56 (Unix) PHP/8.2.4

Here are the Steps -

1. Start a FRESH Install.
2. Upon Installation Completion, head to Enable the Module(s)
3. Do enable your needed other modules.
4. Next, select the followin modules for Installations -
   • Migrate
   • Migrate Drupal
   • Migrate Drupal UI
5. You land up on Error Page.

The Error Shown on Browser is -
"The website encountered an unexpected error. Please try again later."

The error shown in Error Log -
[Tue Jul 25 15:43:36.682665 2023] [php:notice] [pid 70899] [client 127.0.0.1:64881] Uncaught PHP Exception Symfony\\Component\\Routing\\Exception\\RouteNotFoundException: "Route "migrate_drupal_ui.upgrade" does not exist." at /Users/sandipt/Sites/D9/web/core/lib/Drupal/Core/Routing/RouteProvider.php line 206, referer: http://D9.lo:8080/admin/modules

When I add the line \Drupal::service('router.builder')->rebuild(); in function migrate_drupal_ui_install() in migrate_drupal_ui.install file, the error Doesn't appear anymore after installation.

@sandip27, thanks for the extra details.

I followed the steps in #8. After selecting the 2 migrate modules I clicked 'Install' and there was no error. The I re-read your comment and see that you are using PHP 8.2.4. I was using PHP 8.1. But that is likely the problem, Drupal 9 does not support PHP 8.2, see PHP versions supported → .

Can you reproduce this on PHP 8.1?

@quietone, well, then the document PHP versions supported → definitely needs to be updated as I can clearly see and am seamlessly using the Drupal 9 with PHP 8.2.4. Check the below screen shot -

Nonetheless, why selected 2 modules ? Have you tried selecting all 3 ? OR at least try installing 'Migrate Drupal UI' alone and see if error appears. It should.

Sorry, that was a typo. I did enable all three core migrate modules.

The documented versions of PHP support is correct. If this problem is reproducible with supported versions it is eligible for commit.

I think custom help text in hook_install() is a bad pattern, and we should remove this code altogether to be honest.