Fatal error while installing the module: Cannot instantiate interface Magefan\\Blog\\Api\\CategoryRepositoryInterface

[xgerhard]

Describe the bug

Fatal error while installing the Blog module:

"Fatal Error: 'Uncaught Error: Cannot instantiate interface Magefan\\Blog\\Api\\CategoryRepositoryInterface in \/home\/X\/domains\/X.nl\/application\/vendor\/magento\/framework\/ObjectManager\/Factory\/Dynamic\/Developer.php:50

Stack trace:
#0 \/home\/X\/domains\/X.nl\/application\/vendor\/magento\/framework\/ObjectManager\/ObjectManager.php(56): 
Magento\\Framework\\ObjectManager\\Factory\\Dynamic\\Developer->create('Magefan\\\\Blog\\\\Ap...', Array)
#1 \/home\/X\/domains\/X.nl\/application\/vendor\/magefan\/module-blog\/Model\/ResourceModel\/Post\/Collection.php(68): 
Magento\\Framework\\ObjectManager\\ObjectManager->create('Magefan\\\\Blog\\\\Ap...')
#2 \/home\/X\/domains\/X.nl\/application\/generated\/code\/Magefan\/Blog\/Model\/ResourceModel\/Post\/Collection\/Interceptor.php(14): 
Magefan\\Blog\\Model\\ResourceModel\\Post\\Collection->__construct(Object(Magento\\Framework\\Data\\Collection\\EntityFactory), Object(Magento\\Framework\\Logger\\LoggerProxy), Object(Magento\\Framework\\Data\\Collection\\Db\\FetchStrategy\\Query), ' in '\/home\/X\/domains\/X.nl\/application\/vendor\/magento\/framework\/ObjectManager\/Factory\/Dynamic\/Developer.php' on line 50"

Preconditions:

• Magento Version: 2.4.2
• Module Version: 2.10.10.2
• PHP Version 7.3.33

To Reproduce Steps to reproduce the behavior:

1. Run composer require magefan/module-blog
2. Run php bin/magento setup:upgrade

Expected behavior No errors

Actual behavior Fatal error as shown above

Not sure if it's related to other 3rd party extensions, hopefully you guys can point me in the right direction of finding the cause.

[magefan]

@xgerhard ,

Please run the command

bin/magento setup:di:compile

Let us know if it helps.

[xgerhard]

Ah thanks, that should be run before setup:upgrade? I'll try this tomorrow.

[magefan]

@xgerhard, usualy it runs after. But try to run before. For some reason, the implementing class of the interface was not assigned.

[xgerhard]

Unfortunately the same error. I'll see if I can get more info, on a different instance with same Magento version it did work fine.

[magefan]

Try to run this commands

rm -rf generated rm -rf var/cache #if has redis flush redis cache bin/magento setup:di:compile

[xgerhard]

Well... was about to try steps above, but tried the 'normal' way again first: 1. require.., 2. setup:upgrade , 3. di:compile. This time it ran without any errors, so it indeed might have been some cache related issue. Thanks for the suggestions!