No suggestions

Just tried with `symfony/form` package, seems to be working fine:

Could you please share a `composer.json` from your project? Do you have anything configured in "Preferences/Settings| PHP > Include Path"?

Yes, ofcourse.

My `composer.json`:

{
    "type": "project",
    "license": "proprietary",
    "minimum-stability": "dev",
    "prefer-stable": true,
    "require": {
        "php": ">=7.4",
        "ext-ctype": "*",
        "ext-iconv": "*",
        "api-platform/core": "^2.6",
        "composer/package-versions-deprecated": "1.11.99.1",
        "doctrine/annotations": "^1.0",
        "doctrine/doctrine-bundle": "^2.3",
        "doctrine/doctrine-migrations-bundle": "^3.1",
        "doctrine/orm": "^2.8",
        "easycorp/easyadmin-bundle": "^3",
        "nelmio/cors-bundle": "^2.1",
        "php-webdriver/webdriver": "^1.12",
        "phpdocumentor/reflection-docblock": "^5.2",
        "sensio/framework-extra-bundle": "^6.1",
        "symfony/apache-pack": "^1.0",
        "symfony/asset": "5.3.*",
        "symfony/console": "5.3.*",
        "symfony/dotenv": "5.3.*",
        "symfony/expression-language": "5.3.*",
        "symfony/flex": "^1.3.1",
        "symfony/form": "5.3.*",
        "symfony/framework-bundle": "5.3.*",
        "symfony/http-client": "5.3.*",
        "symfony/intl": "5.3.*",
        "symfony/mailer": "5.3.*",
        "symfony/mime": "5.3.*",
        "symfony/monolog-bundle": "^3.7",
        "symfony/notifier": "5.3.*",
        "symfony/process": "5.3.*",
        "symfony/property-access": "5.3.*",
        "symfony/property-info": "5.3.*",
        "symfony/proxy-manager-bridge": "5.3.*",
        "symfony/security-bundle": "5.3.*",
        "symfony/security-core": "5.3.*",
        "symfony/security-http": "5.3.*",
        "symfony/serializer": "5.3.*",
        "symfony/string": "5.3.*",
        "symfony/translation": "5.3.*",
        "symfony/twig-bundle": "^5.2",
        "symfony/validator": "5.3.*",
        "symfony/web-link": "5.3.*",
        "symfony/yaml": "5.3.*",
        "symfonycasts/verify-email-bundle": "^1.5",
        "twig/extra-bundle": "^2.12|^3.0",
        "twig/twig": "^2.12|^3.0"
    },
    "require-dev": {
        "doctrine/doctrine-fixtures-bundle": "^3.4",
        "symfony/browser-kit": "^5.2",
        "symfony/css-selector": "^5.2",
        "symfony/debug-bundle": "^5.2",
        "symfony/maker-bundle": "^1.0",
        "symfony/phpunit-bridge": "^5.2",
        "symfony/stopwatch": "^5.2",
        "symfony/var-dumper": "^5.2",
        "symfony/web-profiler-bundle": "^5.2"
    },
    "config": {
        "optimize-autoloader": true,
        "preferred-install": {
            "*": "dist"
        },
        "sort-packages": true
    },
    "autoload": {
        "psr-4": {
            "App\\": "src/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "App\\Tests\\": "tests/"
        }
    },
    "replace": {
        "symfony/polyfill-ctype": "*",
        "symfony/polyfill-iconv": "*",
        "symfony/polyfill-php72": "*"
    },
    "scripts": {
        "auto-scripts": {
            "cache:clear": "symfony-cmd",
            "assets:install %PUBLIC_DIR%": "symfony-cmd"
        },
        "post-install-cmd": [
            "@auto-scripts"
        ],
        "post-update-cmd": [
            "@auto-scripts"
        ]
    },
    "conflict": {
        "symfony/symfony": "*"
    },
    "extra": {
        "symfony": {
            "allow-contrib": false,
            "require": "5.3.*"
        }
    }
}

Do you have anything configured in "Preferences/Settings| PHP > Include Path"?

No. All settings on this tab are default.

Thanks for sharing the composer.json.

Actually, I was not able to reproduce the issue with your configuration either. What happens when you Ctrl+Click on "FormBuilderInterface", does it navigate you to the interface definition?

Also, would it be possible to share the reproducible project?

1. Not navigate. On hover I can see:

2. Yes, sure:

https://github.com/blink2004/demo-sym 

I deleted some other files which was created by me (few not important Controllers and Entities) and /vendor folder.

Thanks for sharing the project.

In fact, the issue is not reproducible for me with your project as well (of course, I have installed vendor packages from the composer).

It is a somewhat generic question but have you tried to invalidate caches already?

Just in case:
https://www.jetbrains.com/help/phpstorm/invalidate-caches.html

Thanks, Vasiliy, for the answer.

It's very interesting. I understand that problem is on my computer. 

Yes, I did recommendation at the link before wrote this post. Unfortunately, it didn't helped me.

I thinking I am missing something...

The code is located on my computer and FTP-server. PHP and Composer are installed on the server. Maybe some configs? From where take bundles...

Do you have a vendor directory locally in your project?

Yes, ofcourse. /vendor folder has 28Mb size and I didn't wonna upload to GitHub for save the time.

Project created by next steps:

1.

2. 

Could you please share the ".idea" folder from your project copy?

Yes, not a problem. This folder has many confidential information. Could you please provide any security way for transfer? For example, email.

I would suggest submitting a support request via the "Help > Contact Support", it will be much easier to communicate and share files within the support ticket.

Sorry for my delayed answer.

I'm uploaded to GitHub .idea folder as RAR-archive - https://github.com/blink2004/demo-sym/blob/main/.idea.rar

Pre-removed sensitivity data.

No worries at all, thank you for sharing the file.

In fact, I was not able to reproduce the issue with your project settings too (just installed composer.json packages). Just to confirm, do you have an "Import class" fix available for `FormBuilderInterface`?

No...
That is all what I have in context menu:

Hi @Vasiliy Yur,

Maybe you have yet ideas?

Hi there.

No ideas yet, sorry. I think that we are missing something simple and obvious here.
I was wondering if you could share your project as-is with the "vendor" dir and the file from the sample above. Could you please submit a support ticket with the attached archive and share its number?

Hi,
I'm created request #3718486 with attachment.