Can not install theme-tabler because of composer conflict

[intco]

When running backpack:install I've got the error

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires backpack/theme-tabler ^1.2 -> satisfiable by backpack/theme-tabler[1.2.0, ..., 1.2.18].
    - backpack/theme-tabler[1.2.0, ..., 1.2.18] require backpack/crud ^6.2.1 -> found backpack/crud[6.2.1, ..., v6.x-dev] but it conflicts with your root composer.json require (^7.0@dev).

Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

This happens just after selecting the tabler theme

Can you please help to clarify what is going on?

I've attached my composer.json and composer.lock (renamed beacause github complains about extension)

composer.json.txt
composer.lock.txt

[backpack-ai-bot[bot]]

The error you're seeing is due to a version conflict between the version of backpack/crud required by backpack/theme-tabler and the version you have specified in your composer.json. Specifically, backpack/theme-tabler v1.2.x requires backpack/crud ^6.2.1, but your composer.json is requiring backpack/crud ^7.0@dev, which is not compatible.

This kind of conflict happens when you try to install a package (theme-tabler) that depends on a specific version range of another package (crud), but your project is set to use a different, incompatible version.

How to resolve:

• If you want to use backpack/theme-tabler v1.2.x, you must use backpack/crud in the ^6.2.1 range (i.e., version 6.x, not 7.x).
• If you need to use backpack/crud ^7.0@dev, you will have to wait until backpack/theme-tabler releases a version compatible with Backpack 7.x.

Recommendation:
Update your composer.json to require compatible versions, for example:

"require": {
    "backpack/crud": "^6.2.1",
    "backpack/theme-tabler": "^1.2",
    // ... other dependencies
}

Then run:

composer update

If you specifically need to use dev versions or are testing Backpack 7.x, you will need to wait for the theme-tabler package to add support for that version.

Extra tip:
Composer suggests using the --with-all-dependencies flag to allow downgrades or upgrades of related packages, which can sometimes resolve conflicts if your lock file is out of sync:

composer require backpack/theme-tabler:^1.2 --with-all-dependencies

But this will only work if your required versions are compatible.

Summary:
You cannot use backpack/theme-tabler v1.2.x with backpack/crud ^7.0@dev at this time due to version constraints. Use compatible versions as described above, or wait for an update to the theme-tabler package that supports Backpack 7.x.

This is a common scenario when a new major version of Backpack is released and not all add-ons have been updated yet to support it. The knowledge sources confirm that such version conflicts are resolved by aligning your package versions to those that are compatible with each other, as described in the official upgrade guide and various community discussions.

ℹ️ Please note our AI Bot does not reply to follow-ups, this will be the only AI answer in this thread. If the AI helped you find the answer, please mark it as answered or write details below so it can learn. Then close the conversation. If not, please give more information for when a human reads this. ℹ️

Relevant sources:

Github Issue (closed): Unable to install Backpack
Github Issue (closed): Need 0.7.x for CRUD
Github Issue (closed): Updating Laravel 9->10 and error states that backpack CRUD is not supported by L10
Github Issue (closed): Installing 4.1 on Laravel 8
Github Issue (closed): crud 3.0.0 update errors
Github Issue (closed): backpack/settings 2.0.0 requires backpack/crud 0.*
Github Issue (closed): [Bug] Method Backpack\CRUD\app\Library\CrudPanel\CrudPanel::addViewNamespaceFor does not exist.
Github Issue (closed): [Bug] composer require backpack/calendar-operation failed : repository not found
Error on installation
Upgrade Guide|Composer Part 1
Unable to install Backpack
Github Issue (closed): Backpack not found error
tried to convert a simple prj from v6.x-dev to 6.0
remove the tabler theme as dependency (aka make unit tests run again)

[pxpm]

If you want to use the "beta version" you also need to pull the "beta package" versions.

Please remove theme tabler from your composer.json, follow the backpack:install command again, and it should add "backpack/theme-tabler": "dev-next",.

Let us know if you are experiencing any other issues 👍

[intco]

Hi,

removing the theme-tabler from composer.json didn't work but thanks to your suggestion I've:

• manually added "backpack/theme-tabler": "dev-next" to my composer.json
• removed my composer.lock
• removed my vendor directory
• run composer install

then when I run backpack:install the command detected that the theme-tabler extension was installed.

thank you for your time

[pxpm]

Thank you for getting back with such an helpful response. 🙏

All good to you 👍