Drupal 8.x

Hi,

I'm trying to POST a simple file using HTTPClient (Rest API).
I have installed RestUi and configure everyting correctly (I can GET and POST any content type).

My problem is posting a FILE...
I have added FILE (with POST method) in RestUI.

When I launch my POST request, I get "403 forbidden" : 
"Client error: `POST http://XXX/entity/file?_format=hal_json` resulted in a `403 Forbidden` response: {"message":""}"

I have created a custom form and it works.
I need to create another module by clicking on install this error returns me and I don't know what to do to solve the problem. I tried to delete and reinstall it but nothing to do

ReflectionException: Class \Drupal\hello\HelloController does not exist in ReflectionMethod->__construct() (line 136 of core\lib\Drupal\Core\Entity\EntityResolverManager.php).

I trying to integrate charts to my site together with TableFields, and when import csv data, the node show this error.  I looking at google and don´t have any result, if somebody can help me with this thanks in advice.

I am trying to add a new column to a table and I added the column using hook_update_N() in the module.install file:

Hello all,

I am trying to patch a submodule: jsonapi_defaults installed with jsonapi_extras (modules/jsonapi_extras/jsonapi_defaults) using composer on Drupal 8.9.10.

I tried the following:

    "extra": {
         "patches": {
        "drupal/jsonapi_extras" : {
        "Configurable JSON:API Max Limit": "https://www.drupal.org/files/issues/2020-08-09/max-page-limit-configurable_2884292_17.patch"
         }
        },

But was not able to apply patch to the submodule.

Thanks in advance.

Backblaze b2 is some of the most affordable storage I have found. I'm currently working on a personal site that could use 100's of gb's of space if I can make it work the way I hope. So b2 seems like my best bet for something relatively affordable.

They have a S3 compatible API, so I am trying s3fs and flysystem_s3. But I keep having weird issues. I'm still trying to understand the issues enough to make an intelligent support request.

In the meantime, does anyone have any other suggestions on how I can make b2 my storage backend?