Post installation

My content created in Drupal 8 or 7 has images in article summaries. In Drupal 9, the summaries display the correct way but content edit shows only a text field instead of a full HTML edit. How do you fix the summary field to allow the same Full HTML as the body?

During a recent trouble ticket discussion with my hosting company, they mentioned that my site's opcache appears to be over-full, and they recommended that I increase its allocated size.  I can (and probably will) do that, but before I do, I'd like to understand A) is there any down side to increasing my opcache size? B) in general, are what factors might lead a site to overflow its opcache?  i.e. Is this problem simply a function of high traffic, or does it point to a problem in my site's setup that I should work to track down?

Hello.

I use colorbox and have a small problem i upload images, when i watch it i have error This image failed to load . 

Not for every picture.

My 6th day using Drupal.  I need to create a chart that displays the sum of aggregated content. My real content is over 10K items, but to test my ability to sum aggregated content I worked with just 7 simple items.

1) I created a Content Type Simple_Test_Data, which has two integer fields (Year and Observation)

2) I then added content (7 times) for my Simple_Test_Data:

2003    40
2002    60
2005    55
2004    25
2003    30
2002    20
2001    10

Dear sir,

I have a very strange issue. 

I added a new payment gateway for PayPal successfully. Then, I open an order and add a payment. However, there is only one payment option without PayPal payment method. I didn't see any errors in Recent log messages. Would you give some advice?

Thanks.

Billy

Error: Class "\Drupal\barcodes\Template\Barcode" not found in Drupal\Component\DependencyInjection\Container->createService() (line 259 of core/lib/Drupal/Component/DependencyInjection/Container.php).

Drupal\Component\DependencyInjection\Container->get() (Line: 440)

Drupal\Component\DependencyInjection\Container->resolveServicesAndParameters() (Line: 273)

Drupal\Component\DependencyInjection\Container->createService() (Line: 177)

Drupal\Component\DependencyInjection\Container->get() (Line: 197)

Drupal::service() (Line: 52)