Module development and code questions

Dear drupal's expert,

few days ago the site was migrate to another host by my service provider. Today many menu's function doesn't work. For example when I click on  configuration in the menu the system reply http 500 error.

In the file public_html/error_log I see this error:

Hi Drupal Experts,

I'm creating some Katalon test scripts in Drupal but I'm not able to get the text from the selected value in a drop down object. I have checked in other web apps we have and it works.

I have opened a post in Katalon forum and the experts suggested some options that worked for them, but they didn't work for me.

Any suggestion?

This is my firs post here, sorry if this is not the correct place to ask this.

Thanks,

Ruben B

Hello! 

I created a custom module and what that to have a custom header. So instead of taking in the standard custom header I want to display a different one. 

I followed the steps found here: 

https://www.drupal.org/forum/support/module-development-and-code-questions/2017-05-15/drupal-8-custom-module-template

and

Hi,

I'm working on an access form that eventually needs to redirect to another page on my Drupal site. I created a custom module and a form. I also made a config form for the password, which Drupal sees (as well as the cookie all the way below), but I'm having issues with...

1) Creating an error message for an incorrect password.

2) Redirecting the user to my node page once the password is successfully validated.

Thanks for any help.

.install file is not creating a table in my db. The same schema works for one site but does not when i try do it an other file.

Hi,

I create a custom test module and in it I have a block file "/src/Plugin/Block/FirstBlock.php". 

I want to use a twig file to show the header of this block. If I use this block--first-block.html.twig in theme's template folder then it works, but placing the same file in module folder doesn't work and defaults back to classy's block.html.twig. 

Is there something I can do to place it in module folder and have Drupal recognize it? 

Thanks!